P. 1


# OAR Box 

# 1778 Prepped by Ollie Stewart



### Document

Number: 

# 17 ) ll-A- 1 Docket Number: 

# A-90-0 6

Printed 10/28/2008 9:50:52 AM Sheet 17of 276P. 2

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. '. N *Jjr 7 —1 — M := : TU E 16:1 2 S V S T E M O P E R A T I C

COMBUSTION S EMG2NE£RIN G
FINA L REPORT FO R WISCONSI N ELECTRI C POWE R

« POR T WASHINGTO N STATIO N UNI T 2 (ORIGINA L CONTRACT NO
. 11840 )
REA R STEA M ORU M CRAC KINSPECTIO N AN O ANALYSI S STUD Y II-A- 1

SUBMITTE D BY : COMBUSTIO N ENGINEERING , INC. ,

WINDSOR , C T
PS ANO
. 6015 9

MA Y 24 , 198 8P,3 _

•,N-Q</
- 1- S S TU E 1 6 = 1 2 SYSTE M OPERATION S A5 3 2 P . e . „ NOV - 1-8 Q TU G SriSPWP P P - O S WISCONSI N

ELECTRI C POWE RCOMPAN Y POR T WASHINGTO N

UNI T 2 REA RSTEA M DRU M CRAC KINSPECTION AND ANALYSI S STUD Y 

### COMBUSTIO N lE3fG19 f E£K1M G

" , A compariso no f th e two set s o f measurement s o f "crack " lengt hand dept h(th e baselin e SwR I Projec t 79S 7 finding s an d th e mos t recen t finding s o f SwR I - SwR I Projec t 220S ) indicate s th e rat e o f "crack " growt hi s stil l insignificant . Thi s compariso ni s summarize di n Tabl e 1 . Fo r thos e "cracks " tha t increase di n depth , th e rate s o f increas e i

n "crack " dept hfo r row s 62 , 7 5 an d 8 4 wer e respectivel y 6.4 , 6, 9 an

d 6. 3 mil s pe r year . Th e indicate drate s o f "crack " growt h (lengt han

d depth ) ar e withi nmeasuremen t tolerance s a s wer e mos t change s in crac k depth . A s th e rat e o f "crack " propagatio nha s bee nconclude dt o b e insignificant , th e "cracks " i n th e dru

m d o no t represen t a ' safet y problem a t thi s time . Base do n th a above , C- E believe s th e Por t Washingto n2 uni t ma y resum e limite doperatio ni n th e sam e manne r a s i t ha s bee noperate dsinc e 198 4 fo r a perio do f tim e no t t o excee d two years . Th e maximu m allowabl e workin g pressur e shoul db e limite dt o 109 5 psig . Betwee n1 3 t o 2 4 months , row s 62 , 7 5 and 8 4 shoul db e reexamine d utilizin g previousl y

establishe dtechniques . Th e finding s fro m thi s reexaminatio nshoul dthe nb e correlate dan d a n effor t mad e t o determin e th e rat e o f "crack " growth . A t th e end o f thi s period , C- E woul db e willin g t o reac ha join t understandin g wit hWEPC o an d th e stat e authorize dinspectio nagenc y a s t o th e basi s fo r continue d operatio no f th e uni t 2 rea r drum . Th e recommendation s mad e wit hregar dt o reexaminatio nan d assessmen t o f th e dru

m "cracks " i

n 1 8 t o 2 4 month s shoul dno t b e construe da s th e onse t o f a ne w

program fo r long term

operatio no f thi s uni t throug ha serie s o f periodi c evaluations .

PSA-6015 9 - 3 - MA Y 24 , 198 8P. 4

M.l-i/v 1 —1—:=::= : T | , F 1 « = - , —-.. _
- - T U E 1 to . i * « , - ;= : T E M Q R E R A Tj c , ws F . 1 y NOV - 1-8 S TU E SZISRUP P P . ©-4 .

COMBUSTION ^ ENGINEERIN G
FINA L REPOR

T FO R WISCONSI N ELECTRI C POWE R POR T WASHINGTO N

STATIO N UNI T 3 (ORIGINA L CONTRAC

T NO
. 14045 )

REA R STEA M DRU M CRAC KINSPECTIO N AN O ANALYSI S STUDY

SUBMITTE D BY : C0M8USTI0 N

ENGINEERING , INC . WINDSOR , C T

PSA-6015 9

HA Y 24 , 198 8, Nufr
- 1-:=: = TU E 16:1 3 SYSTE M OPERATION S A33 : NOV — 1-S S TU E = 3 : 1 S P W P P P. 5
P . 1 1 P . © S WISCONSI N

ELECTRI C POWE RCOMPAN Y POR T WASHINGTO N

UNI T 3 REA RSTEA M DRU M CRAC KINSPECTIO N ANO ANALYSI S STUD Y 

### " N COMBUSTSON ^ ENGINEERING

A s th e rat e o f "crack " propagatio nha s bee nconclude dt o b e insignificant , th e "cracks " in th e dru m d o no t represen t a safet y proble m a t thi s time . Base don th e above , C- E believe s th e Por t Washingto n3 uni t ma y resum e limite doperatio n1

n th e sam

e manne r a s I t ha s bee noperate dsinc e 198 3 fo r a perio do f tim e no t t o excee dtwo years . Th e maximum allowabl e workin g pressur e shoul db e limite dt o 139 0 psig . Betwee n1 8 t o 2 4 months , row s j3 1 an d3 2 shoul db e reexamine dutilizin g previousl y

establishe dtechniques . Th e finding s fro m thi s reexaminatio nshoul dthenb e correlate dan d an effor t mad e t o determin e th e rat e o f "crack " growth . A t th e en d o f thi s period , C- E woul db e willin g t o reac ha join t understandin g wit hWEPC o and th e stat e authorize dinspectio nagenc y a s t o th e basi s fo r continue d operatio no f the uni t 3 rea r drum . Th a recommendation s mad e wit hregar dto . reexaminatio nan d assessmen t o f th e dru

m "cracks " in 1 8 t o 2 4 month s shoul dno t b e construe da s th e onse t o f a ne

w program fo r long term

operatio no f thi s uni t throug ha serie s o f periodi c evaluations . I t I s no t possibl e t o engag e in a program o f lon g ter m

operatio no f thi s uni t throug ha program o f periodi c "crack " assessmen t becaus e o f th e Impracticalit y

o f trying , t o measur e al l o f th e "cracks" , thei r dimension s an

d orientations . Moreover , th e Interpretatio no f th e result s an

d analysi s o f th e proble m i s ver y comple xan d incorporate s to o man y unknown s t o allo

w absolut e determinatio no f th e lon g term safet y o f th e components .


### /~ s PSA-6015 9 3 - MAY24 , 198 8h i Olv "

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C0MSU5TI0NSE*GINE£2!N G

FINA L REPORT FO R WISCONSI N ELECTRI C POWER POR TWASHINGTO N STATIO N UNI T4 (ORIGINA L CONTRACTNO , 04047 )

REA R STEA M DRU M CRAC KINSPECTIO N AN D ANALYSI S STUO Y

SUBMITTE D BY : * COMBUSTIO N ENGINEERING , INC .

WIN0S0R , CT .

PS A NO . 6015 9

MA Y 24 , 193 8 P. 6 P
. 1 2 P - Qi S

•P. 7

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—S S TU E S!1 6 PWP P P.S T WISCONSI N

ELECTRI C POWE RCOMPAN Y POR T WASHINGTO N

UNI T 4 REA RSTEA M DRU M CRAC KINSPECTION AN O ANALYSI S STUD Y s 

### COMSUST10N 1 ENGINEERIN G — J A compariso no f th e tw

o set s o f measurement s o f "crack " lengt han ddept h (the baselin e SwR I Projec t 795 7 finding s an d th e mos t recen t finding s o f SwR I - SwR I Projec t 2205 ) indicate s th e rat e o f "crack " growt h1 s stil l insignificant . Thi s compariso ni s summarize di n Tabl e 1 . fo r thos e "cracks " tha t increase din depth , th e .rat e o f increas e in "crack " dept h fo r row s 8 3 an

d9 8 wa s respectivel y

7. 3 an d 4. 5 mil s pe r year . Th e indicate drate s o f "crack " growt h(lengt hand depth ) ar e withi n measuremen t tolerances a s wer e mos t change s i n crac k depth . A s th e rat e o f "crack " propagatio nha s bee nconclude dt o b e insignificant , th e "cracks " i n th e dru

m d o no t represen t a safet y proble m a t thi s time . Base don th e above , C- E believe s th e Por t Washingto n4 uni t ma y resum e limite doperatio nin th e sam e manne r a s i t ha s bee noperate dsinc e 198 4 fo r a perio do f tim

e no t t o excee dtwo years . Th e maximu m allowabl e workin g pressur e shoul db e limite dt o 138 9 psig . Betwee n1 8 t o 2 4 months , row s 8 3 and 9 8 shoul db e reexamine dutilizin g previousl y

establishe dtechniques . Th e finding s fro m thi s reexaminatio n shoul dthe nb e correlate dan d a n effor t mad e t o determin e th e rat e o f "crack " growth . A t th e en d o f thi s period , C- E woul db e willin g t o reac ha join t understandin g wit hWEPC o an d th e stat e authorize d inspectio nagenc y

as . t o th e basi s fo r continue doperatio no f th e uni t 4 rea r drum . Th e recommendation s mad e wit hregar dt o reexaminatio nan d assessmen t o f th e dru m "cracks " in 1 8 t o 2 4 month s shoul dno t b e construe da s th e onse t o f a ne w

program fo r lon g ter m operatio no f thi s uni t throug ha serie s o f periodi c evaluations .

PSA-6015 9 - 3 - MA Y 24 , 198 8