P.1 

OAR Box 1778 

Prepped by Ollie Stewart 

Document Number: 

17) ll-A-1 

Docket Number: 

A-90-06 

Printed 10/28/2008 9:50:52 AM Sheet 17of 276 
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COMBUSTIONS EMG2NE£RING 

FINAL REPORT 

FOR 

WISCONSIN ELECTRIC POWER 

« 

PORT WASHINGTON STATION 

UNIT 2 

(ORIGINAL CONTRACT NO. 11840) 

REAR STEAM ORUM CRACK INSPECTION 

ANO ANALYSIS STUDY 

II-A- 1 

SUBMITTED BY: 

COMBUSTION ENGINEERING, INC. , 

WINDSOR, CT 

PSA NO. 60159 

MAY 24 , 1988 
P,3_ 

•,N-Q</- 1- S S TUE 16 = 12 SYSTEM OPERATIONS A 5 3 2 P . e .„ 

NOV- 1-8Q TUG SriSPWP P P - OS 

WISCONSIN ELECTRIC POWER COMPANY 

PORT WASHINGTON UNIT 2 

REAR STEAM DRUM CRACK INSPECTION 

AND ANALYSIS STUDY 

COMBUSTION lE3fG19f E£K1MG 

", A comparison of the two sets of measurements of "crack" length and 

depth (the baseline SwRI Project 79S7 findings and the most recent 

findings of SwRI - SwRI Project 220S) indicates the rate of "crack" 

growth is still insignificant. This comparison is summarized in 

Table 1. For those "cracks" that increased in depth, the rates of 

increase in "crack" depth for rows 62, 75 and 84 were respectively 

6.4, 6,9 and 6.3 mils per year. The indicated rates of "crack" growth 

(length and depth) are within measurement tolerances as were most 

changes in crack depth. 

As the rate of "crack" propagation has been concluded to be 

insignificant, the "cracks" in the drum do not represent a' safety 

problem at this time. 

Based on tha above, C-E believes the Port Washington 2 unit may resume 

limited operation in the same manner as it has been operated since 

1984 for a period of time not to exceed two years. The maximum 

allowable working pressure should be limited to 1095 psig. 

Between 13 to 24 months, rows 62, 75 and 84 should be reexamined 

utilizing previously established techniques. The findings from this 

reexamination should then be correlated and an effort made to 

determine the rate of "crack" growth. At the end of this period, C-E 

would be willing to reach a joint understanding with WEPCo and the 

state authorized inspection agency as to the basis for continued 

operation of the unit 2 rear drum. 

The recommendations made with regard to reexamination and assessment 

of the drum "cracks" in 18 to 24 months should not be construed as the 

onset of a new program for long term operation of this unit through a 

series of periodic evaluations. 

PSA-60159 - 3 - MAY 24, 1988 
P.4 

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COMBUSTION^ ENGINEERING 

FINAL REPORT 

FOR 

WISCONSIN ELECTRIC POWER 

PORT WASHINGTON STATION 

UNIT 3 

(ORIGINAL CONTRACT NO. 14045) 

REAR STEAM DRUM CRACK INSPECTION 

ANO ANALYSIS STUDY 

SUBMITTED BY: 

C0M8USTI0N ENGINEERING, INC. 

WINDSOR, CT 

PSA-60159 

HAY 24, 1988 
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NOV — 1-S S TU E =3 : 1 S P W P P 

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P . © S 

WISCONSIN ELECTRIC POWER COMPANY 

PORT WASHINGTON UNIT 3 

REAR STEAM DRUM CRACK INSPECTION 

ANO ANALYSIS STUDY 

"N COMBUSTSON^ ENGINEERING 

As the rate of "crack" propagation has been concluded to be 

insignificant, the "cracks" in the drum do not represent a safety 

problem at this time. 

Based on the above, C-E believes the Port Washington 3 unit may resume 

limited operation 1n the same manner as It has been operated since 

1983 for a period of time not to exceed two years. The maximum 

allowable working pressure should be limited to 1390 psig. 

Between 18 to 24 months, rows j31 and 32 should be reexamined utilizing 

previously established techniques. The findings from this 

reexamination should then be correlated and an effort made to 

determine the rate of "crack" growth. At the end of this period, C-E 

would be willing to reach a joint understanding with WEPCo and the 

state authorized inspection agency as to the basis for continued 

operation of the unit 3 rear drum. 

Tha recommendations made with regard to. reexamination and assessment 

of the drum "cracks" in 18 to 24 months should not be construed as the 

onset of a new program for long term operation of this unit through a 

series of periodic evaluations. 

It Is not possible to engage in a program of long term operation of 

this unit through a program of periodic "crack" assessment because of 

the Impracticality of trying, to measure all of the "cracks", their 

dimensions and orientations. Moreover, the Interpretation of the 

results and analysis of the problem is very complex and incorporates 

too many unknowns to allow absolute determination of the long term 

safety of the components. 

/~s 

PSA-60159 3 - MAY 24, 1988 
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C0MSU5TI0NSE*GINE£2!N G 

FINAL REPORT 

FOR 

WISCONSIN ELECTRIC POWER 

PORT WASHINGTON STATION 

UNIT 4 

(ORIGINAL CONTRACT NO, 04047) 

REAR STEAM DRUM CRACK INSPECTION 

AND ANALYSIS STUOY 

SUBMITTED BY: 

* 

COMBUSTION ENGINEERING, INC. 

WIN0S0R, CT. 

PSA NO. 60159 

MAY 24, 1938 

P.6 

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WISCONSIN ELECTRIC POWER COMPANY 

PORT WASHINGTON UNIT 4 

REAR STEAM DRUM CRACK INSPECTION 

ANO ANALYSIS STUDY 

s

 COMSUST10N1 ENGINEERING — J 

A comparison of the two sets of measurements of "crack" length and depth 

(the baseline SwRI Project 7957 findings and the most recent findings of 

SwRI - SwRI Project 2205) indicates the rate of "crack" growth 1s still 

insignificant. This comparison is summarized in Table 1. for those 

"cracks" that increased in depth, the .rate of increase in "crack" depth 

for rows 83 and 98 was respectively 7.3 and 4.5 mils per year. The 

indicated rates of "crack" growth (length and depth) are within 

measurement tolerances as were most changes in crack depth. 

As the rate of "crack" propagation has been concluded to be 

insignificant, the "cracks" in the drum do not represent a safety 

problem at this time. 

Based on the above, C-E believes the Port Washington 4 unit may resume 

limited operation in the same manner as it has been operated since 1984 

for a period of time not to exceed two years. The maximum allowable 

working pressure should be limited to 1389 psig. 

Between 18 to 24 months, rows 83 and 98 should be reexamined utilizing 

previously established techniques. The findings from this reexamination 

should then be correlated and an effort made to determine the rate of 

"crack" growth. At the end of this period, C-E would be willing to 

reach a joint understanding with WEPCo and the state authorized 

inspection agency as. to the basis for continued operation of the unit 4 

rear drum. 

The recommendations made with regard to reexamination and assessment of 

the drum "cracks" in 18 to 24 months should not be construed as the 

onset of a new program for long term operation of this unit through a 

series of periodic evaluations. 

PSA-60159 - 3 - MAY 24, 1988