May 15, 2024
Okuma Analysis and Research Center
Fukushima Research and Engineering InstituteJapan Atomic Energy Agency

Analysis Results of ALPS Treated Water(Sampling at March 25, 2024, 10:05 JST)
Analysis was performed on the ALPS treated water in K4-A tank group in measurement andconfirmation facility sampled at March 25, 2024, 10:05 JST.
The analysis results of 3H and other nuclides are as follows:・The confirmation of nuclides other than 3H which have been purified to below the regulatory limit
by ALPS treatment:
The sum of ratios to the regulatory concentration limits of nuclides other than 3H (29 nuclides*1)
was 0.16 (less than 1), confirming that regulatory standard is satisfied.
The nuclides that confirmed not to be significantly present in ALPS treated water (39 nuclides*2):
All target radionuclides were confirmed not to be significantly present.

・The confirmation of 3H concentration in ALPS treated water:
3H concentration was 1.6E+05 Bq/L*3.

The analyzed 68 radionuclides other than 3H are shown in Fig.1

Fig.1 Classification of radionuclides other than 3H*1: The nuclides that should be confirmed to satisfy the discharge standards (below the regulatory
standards) , as defined in the implementation plan.
*2: From the view point of preventing the adverse impacts on reputation, the nuclides which
independently confirmed by TEPCO HD not to significantly present in ALPS treated water.
*3: Dilute more than 100 times so that the 3H concentration after seawater dilution is less thanthe maximum tritium concentration, 1,500 Bq/L/

1

The confirmation of nuclides other than 3H which have been purified to below the regulatory

1.

limit by ALPS treatment
Analysis results for the sum of ratios to the regulatory concentration limits of nuclides other than3

H (29 nuclides) that are confirmed to be less than regulatory limit (sum total of 1) are shown in

Table 1. As the result of analysis, the sum of ratios to the regulatory concentration limits of nuclides
other than 3H was 1.6E-01 (less than 1), confirming that regulatory standard is satisfied.
Table 1 Analysis results of nuclides other than 3H in ALPS treated water(The nuclides which confirmed to be less than regulatory limit)(Sampled at March 25, 2024, 10:05 JST)

Ratios to

NuclideConcentrations

Expanded

Detection

Regulatory

Uncertainty※1

Limit

Concentration
Limit

Regulatory
Concentration Limit※2

Measurement/
Evaluation
method※3[Bq/L][Bq/L][Bq/L][-][Bq/L]

14C

1.4E+01± 3.0E+00

4.4E-01

7.0E-03

2,000

Measurement

54

Mn

ND

-

9.5E-03

9.5E-06

1,000

Measurement

55

Fe

ND

-

4.3E-01

2.2E-04

2,000

Measurement

60

Co

2.6E-01

9.8E-03

1.3E-03200

Measurement± 3.4E-02

63

ND

-

1.1E+01

1.8E-03

6,000

Measurement

79

ND

-

2.0E+00

1.0E-02200

Measurement

4.7E-02

7.4E-02

8.3E-0330

Measurement

Ni
Se

90

Sr

2.5E-01±

Radiative
90Y

2.5E-01-

7.4E-02

8.3E-04300

equilibrium
evaluation

99

Tc

106

Ru

125

Sb

5.9E-01ND
9.3E-02±

1.2E-01

1.0E-01

5.9E-04

1,000

Measurement-

1.0E-01

1.0E-03100

Measurement

4.6E-02

1.2E-04800

Measurement± 3.3E-02

Radiative
125m

Te

2.3E-02-

1.1E-02

2.6E-05900

equilibrium
evaluation

129I

1.1E+00

134

Cs

ND

137

Cs

3.0E-01

144

Ce

ND

147

Pm

151

Sm

1.4E-01

1.2E-01

9

Measurement

4.2E-02

7.0E-0460

Measurement

1.2E-02

3.3E-0390

Measurement-

1.4E-01

7.0E-04200

Measurement

ND-

1.8E-01

6.0E-05

3,000

ND

-

8.6E-03

1.1E-06

8,000± 2.0E-01± 3.9E-02

2

Relative ratio
evaluation
Relative ratio
evaluation

154

ND

-

4.1E-02

1.0E-04400

Measurement

155

ND

-

8.1E-02

2.7E-05

3,000

Measurement

Eu
Eu

234

U

238

U

20

ND

-

1.3E-02

3.3E-03※4

237

Np

20

9

Measurement, Total
α (U, Np group)
Measurement, Total
α (U, Np group)
Measurement, Total
α (U, Np group)

Measurement,
238

Pu

4

Total α (Pu, Am,
Cm group)

Measurement,
239

Pu

4

Total α (Pu, Am,
Cm group))

Measurement,
240

Pu

ND

-

8.6E-03

2.2E-03※4

4

Total α (Pu, Am,
Cm group)

Measurement,
241

Am

5

Total α (Pu, Am,
Cm group)

Measurement,
244

Cm

7

Total α (Pu, Am,
Cm group)

241

Pu

ND

-

2.7E-01

1.4E-03

Sums of the Ratios to Regulatory Concentration Limits

1.6E-01

200

Relative ratio
evaluation

less than 1±○・○.○E±○ means ○.○×10

・

The results are shown in two significant digits.

・Due to rounding of values, the sums may not exactly match with the actual value.

・

ND (Not Detected) in the table indicates that the value is below the detection limit.

・The reference value for the decay correction is the date and time of sampling.

※1: The uncertainty is the degree of variation in analytical value. Uncertainty is determined by combined all thevariations of each step of the analytical procedure from sample collection to measurement. Here, the expanded
uncertainty (U = 2 x u) is attached to the analyzed value by doubling the combined standard uncertainty (u).
※2: Legally required activity concentration limit established in the Ordinance for Operational Safety and Protectionof Specified Nuclear Fuel Materials of the Nuclear Reactors at TEPCO’s Fukushima Daiichi (Appendix of firstand sixth column: The concentration limit in water outside the peripheral surveillance zone [In this table, Bq/cm3
was converted to Bq/L]).
※3: Details of the measurement and evaluation methodology are described below.

3Measurement: The radiation of samples is measured then the results are converted into the concentrations of eachnuclide.
Total α (U, Np group): U and Np derived α rays of the samples were measured and the results are converted tototal α concentration.
Total α (Pu, Am, Cm group): Pu, Am, Cm derived α rays of the samples were measured and the results areconverted to total α concentration.
Radiative equilibrium evaluations: The state in which the ratio of the number of atoms of the parent nuclide tothat of its progeny nuclides in a decay series is nearly constant is calledradiative equilibrium. The concentration of each nuclide was evaluated basedon this radiative equilibrium relationship and the measurement results of theparent (or progeny) nuclide.
Relative ratio evaluation: The ratio of each nuclide present in the reactor is evaluated by taking into account thegeneration, decay, impairment loss, etc. of the nuclides. The concentration of eachnuclide is calculated by multiplying the measurement results of the reference nuclide
by its existence ratio.

※4: The ratio to the regulatory concentration limits of α nuclides (U-234, U-238, Np-237, Pu-238, Pu-239, Pu-240,
Am-241, and Cm-244) was calculated by dividing the total alpha value by the lowest required activity
concentration limit (4 Bq/L) of the selected alpha nuclides.

Analysis results of 3H in ALPS treated water2.

Analysis results for the 3H concentration in ALPS treated water are shown in Table 2. As the resultof analysis, 3H concentration was confirmed to be 1.6E+05 Bq/L.
Table 2 Analysis results of 3H in ALPS treated water (sampled at March 25, 2024 10:05 JST)
Nuclide3

H

Activity

Expanded

Detection

Regulatory

Regulatory

Measurement/

Concentrations

Uncertainty※1

Limit

Concentration

Limit※2

Evaluation[Bq/L][Bq/L][Bq/L]

Ratio[Bq/L]

method※3

1.6E+05±1.7E+04

7.9E+01

2.7E+00

60,000Measurement

・○.○E±○ means ○.○×10±○

・

The results are shown in two significant digits.

・The reference value for the decay correction is the date and time of sampling.

※1: The uncertainty is the degree of variation in analytical value. Uncertainty is determined by combined all thevariations of each step of the analytical procedure from sample collection to measurement. Here, the expanded
uncertainty (U = 2 x u) is attached to the analyzed value by doubling the combined standard uncertainty (u).
※2: Legally required activity concentration limit established in the Ordinance for Operational Safety and Protectionof Specified Nuclear Fuel Materials of the Nuclear Reactors at TEPCO’s Fukushima Daiichi (Appendix of firstand sixth column: The concentration limit in water outside the peripheral surveillance zone [In this table, Bq/cm34

was converted to Bq/L]).
※3: Measurement: The radiation of samples is measured then the results are converted into the concentrations of eachnuclide.

3.

Nuclides other than 3H to be confirmed as not significantly present in ALPS treated water
Analysis results for the target nuclides (39 nuclides) other than 3H that were confirmed to be as not

significantly present in ALPS treated water are shown in Table 3. As the result of analysis, all target
radionuclides were confirmed not to be significantly present. Furthermore, the sum of the ratios to theregulatory concentration limits for the 68 nuclides in Tables 1 and 3 is also less than 1.
Table 3 Analysis results of nuclides other than 3H in ALPS treated water(Nuclides which confirmed not to be significantly present) (sampling time: March 25, 2024 10:05 JST)
Activity
NuclideConcentrations

Regulatory
Concentration

Regulatory
Limit※1

Ratio

Evaluation※2

Measurement/
Evaluation method※3[Bq/L][-][Bq/L]

59

Fe

1.8E-02

4.5E-05400〇

Measurement

58

Co

1.1E-02

1.1E-05

1,000〇

Measurement

65

Zn

1.8E-02

9.0E-05200〇

Measurement

86Rb

1.6E-01

5.3E-04300〇

Measurement

8.7E-02

2.9E-04300〇

Measurement

91Y

4.9E+00

1.6E-02300〇

Measurement

95Nb

1.5E-02

1.5E-05

1,000〇

Measurement

1.6E-02

1.6E-05

1,000〇

MeasurementRh

1.6E-028.0E-08

200,000〇Rh

1.0E-01

3.3E-07300,000〇

1.1E-02

3.7E-05300〇

Measurement

113m

1.3E-01

3.3E-0340〇

Measurement

115m

6.0E-01

2.0E-03300〇

Measurement

119m

Sn

2.9E-02

1.5E-05

2,000〇

Relative ratio evaluation

123

Sn

1.7E+00

4.3E-03400〇

Measurement126

3.7E-01

1.9E-03200〇

Measurement124

2.0E-02

6.7E-05300〇

Measurement

123m

Te

2.1E-02

3.5E-05600〇

Measurement

127

Te

2.0E+00

4.0E-04

5,000〇

Measurement

127m

Te

2.1E+00

7.0E-03

300〇

Relative ratio evaluation

129

Te

2.0E-01

2.0E-05

10,000〇Measurement

89

Sr

103

Ru

103m

106

110m

Ag
Cd
Cd

Sn
Sb

5

Radiative equilibrium
evaluation
Radiative equilibrium
evaluation

129m

Te

4.0E-01

1.3E-03300〇

Measurement

135

Cs

8.1E-08

3.3E-09

600〇

Relative ratio evaluation

136

1.5E-02

5.0E-05300〇

MeasurementBa

1.2E-02

3.5E-07800,000

〇

140

Ba

7.1E-02

2.4E-04300〇

Measurement141

3.2E-02

3.2E-05

1,000〇

Measurement

1.4E-01

7.0E-06

20,000〇Pr

1.4E-03

3.5E-08

40,000〇146Pm

1.9E-02

2.1E-05900〇

Measurement148

1.1E-01

3.7E-04300〇

Measurement

148m

Pm

1.4E-02

2.8E-05500〇

Measurement

152

Eu

6.2E-02

1.0E-04600〇

Measurement

153

Gd

4.9E-02

1.6E-05

3,000〇

Measurement

3.5E-02

7.0E-05500〇

Measurement

4.9E-05

9.8E-06

5〇

Relative ratio evaluation

5

〇

60

〇

6

〇

Cs

137m

Ce

144

Pr

144m

Pm

160

Tb

242m

Am

243

Am

242

Cm

8.6E-03

2.2E-03※4

243

Cm

・

○.○E±○ means ○.○×10±○

・

The results are shown in two significant digits.

・Due to rounding of values, the sums of shown results in the table may not match.

・

The reference value for the decay correction is the date and time of sampling.

Radiative equilibrium
evaluation

Radiative equilibrium
evaluation
Radiative equilibrium
evaluations

Measurement, Total α(Pu, Am, Cm group)

Measurement, Total α(Pu, Am, Cm group)

Measurement, Total α(Pu, Am, Cm group)※1: Legally required activity concentration limit established in the Ordinance for Operational Safety and Protectionof Specified Nuclear Fuel Materials of the Nuclear Reactors at TEPCO’s Fukushima Daiichi (Appendix of firstand sixth column: The concentration limit in water outside the peripheral surveillance zone [In this table, Bq/cm3
was converted to Bq/L]).
※2: If it is not significantly present, it is marked with a "○"; if it is significantly present, it is marked with an "×".
The evaluation is made as not significantly present ("○") if any of the following are satisfied:・The measured nuclide concentration is below the detection limit.

・

Nuclides evaluated by radiative equilibrium, etc.: When the evaluated nuclide is detected, the concentration
is extremely low compared to the regulatory concentration limit, i.e., the evaluated value is less than the set
detection limit (less than 1/100 of the regulatory concentration limit), and can be judged to be equivalent toless than the detection limit.

6

EvaluatedRegulatory

Value

Concentration[Bq/L]

Ratio

103m

Rh

ND

-

200,000

106

Rh

ND

-

300,000

Evaluated
Nuclide

119m

Sn

・

Regulatory Limit※1[Bq/L]

ND

-

2,000

127m

Te

ND

-

300

135

Cs

2.0E-06

3.3E-09

600

137m

Ba

2.8E-01

3.5E-07800,000

144

Pr

ND

-

20,000

144m

Pr

ND

-

40,000

242m

Am

ND

-

5

ND (Not Detected) in the table indicates that the value is below the detection limit.

※3: Details of the measurement and evaluation methodology are described below.
Measurement: The radiation of samples is measured then the results are converted into the concentrations of eachnuclide.
Total α (U, Np group): U and Np derived α rays of the samples were measured and the results are converted tototal α concentration.
Total α (Pu, Am, Cm group): Pu, Am, Cm derived α rays of the samples were measured and the results areconverted to total α concentration.
Radiative equilibrium evaluations: The state in which the ratio of the number of atoms of the parent nuclide tothat of its progeny nuclides in a decay series is nearly constant is calledradiative equilibrium. The concentration of each nuclide was evaluated basedon this radiative equilibrium relationship and the measurement results of theparent (or progeny) nuclide.
Relative ratio evaluation: The ratio of each nuclide present in the reactor is evaluated by taking into account thegeneration, decay, impairment loss, etc. of the nuclides. The concentration of eachnuclide is calculated by multiplying the measurement results of the reference nuclide
by its existence ratio.
※4: The ratio to the regulatory concentration limits of α nuclides (Am-243, Cm-242, and Cm-243) was calculated by
dividing the total alpha value by the lowest required activity concentration limit (4 Bq/L) of the selected alphanuclides.

7

Reference: Measurement and evaluation methods for each nuclide
in the third-party analysis of ALPS treated water
Measurement and evaluation methods for each nuclide

No.

Nuclide

1

3

2

14

3

54

4

55

5

59

6

58

7

60

8

63

9

65

10

79

11

86

12

89

13

90

14

90

Evaluation

15

91

Y

γ-ray

16

95

Nb

γ-ray

17

99

18

103

H

in the third-party analysis of ALPS treated water
β-ray

C

β-ray

Mn

γ-ray

Fe

X-ray

Fe

γ-ray

Co

γ-ray

Co

γ-ray

Ni

β-ray

Zn

γ-ray

Se

ICP-MS

Rb

γ-ray

Sr

Sr
Y

Tc

Ru

β-ray

β-ray

ICP-MS

γ-ray

Purify tritiated water by distillation and mixing sample and scintillator
Liquid scintillation counter
Isolation by collection on adsorbent, mixing sample and scintillator
Liquid scintillation counter
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin and sedimentation
Low-energy photon detector (Ge-LEPS)
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin, mixing sample and scintillator
Liquid scintillation counter
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin
Inductively coupled plasma mass spectrometer
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin and sedimentation
Beta-ray spectrometer (plastic scintillator)
Isolation by resin and sedimentation
Beta-ray spectrometer (plastic scintillator)
Radiative equilibrium evaluation
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin
Inductively coupled plasma mass spectrometer
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector

8

A single sample was prepared in a Marinelli beaker.

19

106

20

103m

Rh

Evaluation

Radiative equilibrium evaluation

21

106

Rh

Evaluation

Radiative equilibrium evaluation

22

110m

23

113m

24

115m

25

119m

Sn

Evaluation

26

123

Sn

γ-ray

27

126

28

124

29

125

30

123m

31

125m

Te

Evaluation

32

127

Te

γ-ray

33

127m

Te

Evaluation

34

129

Te

γ-ray

35

129m

36

129

37

134

38

135

Evaluation

39

136

γ-ray

40

137

Ru

Ag

Cd

Cd

Sn

Sb

Sb

Te

Te

γ-ray

γ-ray

β-ray

γ-ray

γ-ray

γ-ray

γ-ray

γ-ray

γ-ray

I

X-ray

Cs

γ-ray

Cs
Cs

Cs

γ-ray

Gamma-ray spectrometry using high purity germanium (HPGe) detector

A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Isolation by resin, mixing sample and scintillator
Liquid scintillation counter
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Relative ratio evaluation:
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Radiative equilibrium evaluation
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Radiative equilibrium evaluation
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a measurement cell.

Low-energy photon detector (Ge-LEPS)
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Relative ratio evaluation:
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector

9

41

137m

Ba

Evaluation

42

140

Ba

γ-ray

43

141

44

144

45

144

46

Ce

Ce
Pr

γ-ray

γ-ray

Radiative equilibrium evaluation
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector

Evaluation

Radiative equilibrium evaluation

144m

Pr

Evaluation

Radiative equilibrium evaluation

47

146

Pm

γ-ray

48

147

Evaluation

49

148

γ-ray

50

148m

51

151

52

152

53

154

54

155

55

153

56

160

57

234

58

238

59

237

60

238

61

239

Pm
Pm

Pm

γ-ray

Sm

Evaluation

Eu

Eu

γ-ray

γ-ray

Eu

γ-ray

Gd

γ-ray

Tb

U

γ-ray

α-ray

U

α-ray

Np

α-ray

Pu

Pu

α-ray

α-ray

A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Relative ratio evaluation:
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Relative ratio evaluation:
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
A single sample was prepared in a Marinelli beaker.
Gamma-ray spectrometry using high purity germanium (HPGe) detector
Separated by resin and evaporated and solidified on a stainless plate
α-ray scintillation counter (ZnS scintillator)
Separated by resin and evaporated and solidified on a stainless plate
α-ray scintillation counter (ZnS scintillator)
Separated by resin and evaporated and solidified on a stainless plate
α-ray scintillation counter (ZnS scintillator)
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)

10

62

240

63

241

Pu

Evaluation

64

241

Am

α-ray

65

242m

Am

Evaluation

66

243

Am

α-ray

67

242

68

243

69

244

Pu

Cm

Cm

Cm

α-ray

α-ray

α-ray

α-ray

Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Relative ratio evaluation:
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Relative ratio evaluation:
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)
Separated by resin, collected as sedimentation, and evaporated to dryness
α-ray scintillation counter (ZnS scintillator)

11