Appendix A 

Photographs from the Effects of Temperature 

on Stem Lubricants Testing

A-1
Figure A-42. New Exxon Nebula EP 1 was used for the elevated temperature testing.

A-3
Figure A-43. After testing, the EPI had changed from tan to brown and had hardened.

Figure A-44. After testing, the EP I had hardened inside the stem nut.

A-4
Figure A-45. Nebula EP I smear comparison.

Figure A-46. After testing, the EPI had changed from tan to brown and had hardened.

A-5

MOVLS Lubrication Aging Effects Testing 

New Sample Post Test Sample 

(Test at Z-5b ,F) 

Date: 12/2/A4 

Grease: 'E/A ,E P- / 

INEEL
Figure A-47. EP I smear.

Figure A-48. New Chevron SRI was used for the elevated temperature testing.

A-6
Figure A-49. A thin coat of SRI was applied each stem.

Figure A-50. After testing, the SRI had changed to dark brown and hardened.

A-7
• sz 

i-

// 

z5 TE-/y 'tZ

Figure A-51. Chevron SRI smear comparison.

Figure A-52. After several days, the oil absorption into the paper indicates similar oil content.

A-8

MOVLS Lubrication Aging Effects Testing 

New Sample Post Test Sample 

(Test at ASo F) 

Date: =L!•/, . 

Grease: 

INEEL

"I/
r 1, 7 ------

Figure A-53. New Mobil MobilGrease 28 was used for the elevated temperature testing.

Figure A-54. A thin coat of M28 was applied to each stem. 

A-9
Figure A-55. After testing, the M28 had changed almost to black and had hardened. 

MOVLS -ubrication Aging Effects Testing 

New Sample Post Test Sample (Test at *.%0 F) 

Date: Ale V'. 16, /9-57

Grease: 2-. z - ZINEEL 

Figure A-56. Mobil 28 smear comparison.

A-10
MOVLS L

Now Sample Po"t Tout Sample 

(Test at 2-r6a 

Date.-v' ,/V 

Oreaso. ; - , 

IMIEEL

Figure A-57. After several days, the radius of absorption is half the new sample.

A-1I
Figure A-58. New SWEPCO Moly 101 was used for the elevated temperature testing. 

A-12
Figure A-59. A thin coat of Moly 101 was applied to each stem.

Figure A-60. After testing, the Moly 101 had thickened.

A-13
Figure A-61. After testing, the Moly 101 had thickened.

MOVLS Lubrication Aging Effects Testing 

New Sample Post Test Sample 

(Test at -Z'-J0F) 

Date: A4-V". e /

Grease: ,1-L '/ •,'E"•¶;p /' / 

INEEL

Figure A-62. Moly 101 smear comparison.

A-14
Figure A-63. New LOCTITE N-5000 Anti-Seize was used for the elevated temperature testing.

A-15
Figure A-64. After testing, the N-5000 had separated and moved down the stem.

Figure A-65. After testing, the N-5000 had separated and dripped from the stem nut.

A-16
Figure A-66. The N-5000 above the stem nut travel appeared to be unchanged. 

Figure A-67. Several drips of clear and silver-colored portions of the N-5000 landed on the stem spacer.

A-17
-

New Sample Post Test Sample 

(Test at ;Z5O'F)

Figure A-68. N-5000 smear comparison.

A-18
Appendix B 

Change in Friction at Elevated Temperature

B-I
Stem 2 - Exxon Nebula EP1

K Elev. Temp. Tests 

• Step Tests 

-Linear Fit

Temperature (°F) 

Figure B-1. The change in stem nut friction for stem 2 with EP 1 at elevated temperature. 

Stem 3 - Exxon Nebula EP1

• Elev. Temp. Tests 

* Step Tests 

-Linear Fit

Temperature (*F)

Figure B-2. The change in stem nut friction for stem 3 with EP I at elevated temperature.

B-3

0.17

0 

S0.15 

U

'4

0 

4- 0.13 

5Z 

a, 0.11 0 0

0.09

0

* - [] 

[]

100 200 300

0.17 

0 

•0.15 

,-0. 13 I-0 

0.09

* 

U U

0 100 200 300
Stem 4 - Exxon Nebula EP1

0.17

mU 

Um 

m 

Um

* Elev. Temp. Tests 

* Step Tests 

Linear Fit

0 100 200 300 

Temperature (OF) 

Figure B-3. The change in stem nut friction for stem 4 with EP 1 at elevated temperature.

Stem 5 - Exxon Nebula EP1

M

U 

U 

U

* Elev. Temp. Tests 

* Step Tests 

Linear Fit

0 100 200 300 

Temperature (°F) 

Figure B-4. The change in stem nut friction for stem 5 with EP 1 at elevated temperature.

B-4

C 

0 

"-0.15 

"L.. 

U

0 

-0.13 

Z 

00.11 

0. 

0.09

0.17 

.20.15 

LL 

20.13 

°0.11 C., 

0.09 

0.09
Stem 2 - Chevron SRI

100 200 

Temperature (OF)

* Elev. Temp. Tests 

* Step Tests 

-Linear Fit

300

Figure B-5. The change in stem nut friction for stem 2 with SRI at elevated temperature. 

Stem 3 - Chevron SRI

0.17 

0 

'0.15 

I.-. 

4

0 

00.11 0 

0.09

0 100 200 

Temperature (OF)

* Elev. Temp. Tests 

* Step Tests 

-Linear Fit

300

Figure B-6. The change in stem nut friction for stem 3 with SRI at elevated temperature.

B-5

0.17 

0 

S0.15 

U

4I

. 0.13 

a 0.11 

0 

0.09

0

U

I I

_L_
Stem 4 - Chevron SRI

100 200 

Temperature (OF)

* Elev. Temp. Tests 

n Step Tests 

Linear Fit

300

Figure B-7. The change in stem nut friction for stem 4 with SRI at elevated temperature. 

Stem 5 - Chevron SRI

* Elev. Temp. 

* Step Tests 

- Linear Fit

Temperature (OF) 

Figure B-8. The change in stem nut friction for stem 5 with SRI at elevated temperature.

B-6

0.16 

0 

=0.14 

I*

0 

0l.1 

C 

W,0.10 0 

00, 

0.08

0

M

U

U

0.17 

0 

";- 0.150 •. 

4

0 0.13 

00.11 

0 

0.09

U]

Test

0 100 200 300
Stem 2 - Mobil Mobilgrease 28

100 200 

Temperature (OF)

* Elev. Temp. Tests 

N Step Tests 

- Linear Fit

300

Figure B-9. The change in stem nut friction for stem 2 with Mobil 28 at elevated temperature.

Stem 3 - Mobil Mobilgrease 28

100 200 

Temperature (°F)

*Elev. Temp. Tests A! 

Step Tests A 

Elev. Temp. Tests Bý 

* Step Tests B 

-Linear Fit

300

Figure B-10. The change in stem nut friction for stem 3 with Mobil 28 at elevated temperature.

B-7

coo

0.17

C 

0 

U 0.15 

LAL 

0 

Z0.13 

W0.11 

0* 

U)

0.09

0

0.15

C 

0 

t0. 1 3 

U. 

0 

-0.11 

r O.2l 

W 0.09 

0 

U

0.07

II

0
Stem 4 - Mobil Mobilgrease 28

0.15 

0.13 

O.2l 

0.11 

0.09 

.- 0.07 

0 

C.) 0.05 

0.03

*Elev. Temp. Tests A 

* Step Tests A 

* Elev. Temp. Tests B 

* Step Tests B 

- Linear Fit

300

Figure B-11. The change in stem nut friction for stem 4 with Mobil 28 at elevated temperature. 

Stem 5 - Mobil Mobilgrease 28

100 200 

Temperature (

0F)

# Elev. Temp. Tes 

* Step Tests 

- Linear Fit

300

Figure B-12. The change in stem nut friction for stem 5 with Mobil 28 at elevated temperature. 

B-8

C-0_

U]

100 200 

Temperature (

0F)

0

I

- U 

* __

0.17 

r 

Z0.15 

.C 

"ý6 i .13 

.2 

0).11 

0.09

U

0

J
Stem 2 - SWEPCO Moly 101

0 100 200 

Temperature (°F)

* Elev. Temp. Tests 

I Step Tests 

Linear Fit

300

Figure B-13. The change in stem nut friction for stem 2 with Moly 101 at elevated temperature. 

Stem 3 - SWEPCO Moly 101 

0.17 

•O 0.15 

U• "o * Elev. Temp. Tests: 

_ 0.13 -- Step Tests 

Z3_- - Linear Fit

G)0.11 

0 

0.09 .4

0 100 200 300

Temperature (*F) 

Figure B-14. The change in stem nut friction for stem 3 with Moly 101 at elevated temperature.

B-9

0.18 

0 

*~0.16 

L

46

0 *-0.14 

w) 0.12 

0 

S0.10 0.1 
Stem 4 - SWEPCO Moly 101

0.16 

.20.14 

LL 

4

00.12 

.£ 

00.10 0 

0.08

100

a

200

* Elev. Temp. Tests 

* Step Tests 

- Linear Fit

300

Temperature (OF) 

Figure B-15. The change in stem nut friction for stem 4 with Moly 101 at elevated temperature.

Stem 5 - SWEPCO Moly 101

* Elev. Temp. Tests 

* Step Tests 

- Linear Fit

0 100 200 300

Temperature (OF) 

Figure B-16. The change in stem nut friction for stem 5 with Moly 101 at elevated temperature.

B-10

U 

U 

a

0

0.17

0.15 

L.. 

4

0 

S0.13 

o0.11 

0 

U0.09

U 

U 

a
Stem 2 - LOCTITE N-5000 Anti-Seize

100 200 

Temperature (°F)

* Elev. Temp. 

* Step Tests 

[ -. Linear Fit

300

Figure B-17. The change in stem nut friction for stem 2 with N-5000 at elevated temperature. 

Stem 3 - LOCTITE N-5000 Anti-Seize

* EIev. Temp. Tests 

M Step Tests 

-Linear Fit

Temperature (OF)

Figure B-18. The change in stem nut friction for stem 3 with N-5000 at elevated temperature.

B-1I

0.18 

.2 0.16 

"U 

%I-. 

00.14 

o0.12 

0 

0.10

0

N

0

Tests

0

0.17 

.20.15 

U. 

LL 

°0.13 

D0.11 

0 

0.09

-U _

I U

0 100 200 300
Stem 4 - LOCTITE N-5000 Anti-Seize

0 100 200 

Temperature ('F)

* Elev. Temp. Tests 

* Step Tests 

Linear Fit

300

Figure B-19. The change in stem nut friction for stem 4 with N-5000 at elevated temperature. 

Stem 5 - LOCTITE N-5000 Anti-Seize

* Elev. Temp. Tests 

M Step Tests 

Linear Fit

Temperature (*F) 

Figure B-20. The change in stem nut friction for stem 5 with N-5000 at elevated temperature.

B-12

0.18 

.20.16 

U

60.12 

0 ,-) 

0.10

0.18 

C 

.2 0.16 

IJ.. 

4I0 0.14 

w) 0.12 

0 

0.10

_- U

0 100 200 300
Appendix C 

End of Stroke Friction Behavior

C-1
Stem 2 

_ U- Stem 3 

---- Stem 4 

-Stem 5

Initial Cold Hot Test Final Cold 

70 250 70 

Temperature (OF)

Figure

C-1. End of stroke friction behavior for the single step tests with Exxon Nebula EP 1.

Chevron SRI

Stem 2 

-U-- Stem 3 

A Stem 4 

-X- Stem 5

Initial Cold 

70

Hot Test 

250 

Temperature (°F)

Figure C-2. End of stroke friction behavior for the single step tests with Chevron SRI.

C-3

Exxon Nebula EP1

80% 

70% 

060% 

S50% 

S40% 

U= 30% 

a. 20% 

10% 

0%

0) 

C-, 

a

I.

0 

0,,,

80% 

70% 

60% 

50% 

40% 

30% 

20% 

10% 

0% 

-10%

Final Cold 

70
Mobil Mobilgrease 28

-- Stem 2 

-- Stem 3 

A Stem 4 

X Stem 5

Initial Cold Hot Test Final Cold 

70 250 70 

Temperature (OF)

Figure C-3. End of stroke friction behavior for the single step tests with Mobil Mobilgrease 28. 

SWEPCO Moly 101

-4-Stem 2 

-5-Stem 3 

A, Stem 4 

- Stem 5

Initial Cold 

70

Hot Test 

250 

Temperature (OF)

Figure C-4. End of stroke friction behavior for the single step tests with SWEPCO Moly 101.

C-4

60% 

50% 

S40% 

o30% 

2 20% 

10% 

0%

90% 

80% 

• 70% 

60% 

"50% 

E- 40% 

S30% 

a- 2 0 % 

10% 

0%

Final Cold 

70
LOCTITE N-5000 Anti-Seize

Initial Cold Hot Test Final Cold 

70 250 70 

Temperature (*F)

Figure C-5. End of stroke friction behavior for the single step tests with LOCTITE N-5000 Anti-Seize.

Stem 2

- EP1 

-- SRI 

-kM28 

---- M101 

-*. N5000

Initial Cold 

70

Hot Test 

250 

Temperature ('F)

Figure C-6. End of stroke friction behavior for the single step tests with Stem 2.

C-5

60% 

50% 

40% 

S30% 

2 20% 

10% 

0%

4) 

4-) 

CL 

t,

4).

60% 

50% 

40% 

30% 

20% 

10% 

0% 

-10%

Final Cold 

70

....................
-- EP1 

-5SRI 

- M28 

•M1101 

- N5000

Initial Cold 

70

Hot Test 

250 

Temperature (

0F)

Figure C-7. End of stroke friction behavior for the single step tests with Stem 3. 

Stem 4 

90% 

80% 

a7 0 % 

S60% -EP 

" 50% SRI 

4E 40% A M28 

P 30% •Mi 

a----. * N5000

/U o 

10% 

0%

Initial Cold 

70

Hot Test 

250 

Temperature (*F)

Figure C-8. End of stroke friction behavior for the single step tests with Stem 4.

C-6

Stem 3

60% 

50% 

E- 40% 

o 30% 

1a, 

S20% 

10% 

0%

x

Final Cold 

70

Final Cold 

70

m
-*--EP1i 

-U--SRI 

S-M28 

-*-- M1011 

* N5000

Initial Cold Hot Test Final Cold 

70 250 70 

Temperature (OF)

Figure C-9. End of stroke friction behavior for the single step tests with Stem 5.

C-7

60% 

50% 

40% 

O30% 

0. • 20% 

10% 

0%
NRC FORM 335 U.S. NUCLEAR REGULATORY COMMISSION 1. REPORT NUMBER 

(2-89) (Assigned by NRC, Add Vol., Supp., Rev., 

NRCM 1102, and Addendum Numbers, if any.) 

3201, 3202 BIBLIOGRAPHIC DATA SHEET 

(See instructions on the reverse) NUREG/CR-6750 

2. TITLE AND SUBTITLE INEEL/EXT-01-00816 

Performance of MOV Stem Lubricants at Elevated Temperature 3. DATE REPORT PUBLISHED 

MONTH YEAR 

October 2001 

4. FIN OR GRANT NUMBER 

W6593 

5. AUTHOR(S) 6. TYPE OF REPORT 

K.G. DeWall, J.C. Watkins, M.E. Nitzel Technical 

7. PERIOD COVERED (Inclusive Dates) 

8. PERFORMING ORGANIZATION - NAME AND ADDRESS (If NRC, provide Division, Office or Region, U.S. Nuclear Regulatory Commission, and mailing address; if contractor, 

provide name and mailing address.) 

Idaho National Engineering and Environmental Laboratory 

Idaho Falls, ID 83415-3129

9. SPONSORING ORGANIZATION - NAME AND ADDRESS (If NRC, type "Sameas above'; if contractor, provide NRC Division, Office or Region, U.S. Nuclear Regulatory Commission, 

and mailing address.)

Division of Engineering Technology 

Office of Nuclear Regulatory Research 

U.S. Nuclear Regulatory Commission 

Washington, DC 20555-0001

10. SUPPLEMENTARY NOTES 

J.E. Jackson, NRC Project Manager

11. ABSTRACT (200 words or less)

This report documents the results of recent tests sponsored by the Nuclear Regulatory Commission (NRC) and performed by 

the Idaho National Engineering and Environmental Laboratory (INEEL). These tests address the effectiveness of the lubricant 

used on the threaded portion of the valve stem, where the stem nut turns on the stem, when subjected to design basis 

temperature. Recent testing indicates that an elevated temperature environment can lead to significant increases in the friction 

coefficient at the stem/stem-nut interface. Laboratory experience and field experience both indicate that after long periods in 

elevated temperature environments, the lubricants may lose their lubrication qualities. The results from an earlier accelerated 

aging test are presented. The accelerated aging test identified the concerns that led to the elevated temperature testing.

12. KEY WORDS/DESCRIPTORS (List words or phrases that will assist researchers in locating the report.) 13. AVAILABILITY STATEMENT 

unlimited 

Motor-operated valve (MOV), stem lubrication, stem factor, rate-of-loading uR liFitId 

14. SECURITY CLASSIFICATION 

(This Page) 

unclassified 

(This Report) 

unclassified 

15. NUMBER OF PAGES 

16. PRICE

NRC FORM 335 (2-89)

I m
Federal Recycling Program
ISBN 0-16-050979-3 

90000 

9 -780160 50979 7 -- -
UNITED STATES 

NUCLEAR REGULATORY COMMISSION 

WASHINGTON, DC 20555-0001 

OFFICIAL BUSINESS 

PENALTY FOR PRIVATE USE, $300