ML20195G847

Advises That Util 881026 Response to NRC Bulletin 88-008, Thermal Stresses in Piping Connected to RCS Acceptable. Conditions Addressed by Bulletin Unlikely to Occur at Plant

ML20195G847
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/22/1988
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
References
IEB-88-008, IEB-88-8, TAC-71380, NUDOCS 8811300074
Download: ML20195G847 (4)

Text

. _.. _ _ _ _ _

November 22, 1988 0

Docket flo. 50-267 fir. R. O. W1111aris, Jr.

Senior Vice President, fiuclear Operations Public Service Corpany of Colorado Post Office Cox 840 Denver, Colorado 60201-0840

Dear l'r Williers:

SllBJECT: i:RC EL'LLETitt i0. 68-08: THEftAL STRESSES lti PIP!bG C0hhECTED TO FEAC10R CCOLAl;T SYSTEMS We have reviewtd ycur response dated October TC,1988 to itRC Bulletin E8-08.

This tulletin was concerred with the rotential for high thert:61 stresses to be developed in piping systers connected to the reactor coolant systen of light hdter rt dCtors.

Ycur response f.oted that ycu have coriducted an equivalent revi m cf this issue for fort St. Vrain (FSV) gas ccoled reactor ccolant systen.

Connecting auxiliary pipitig sjsters contain heliut, rather than water. Thesc systas do not have cerditions that sculd lead to high thr:rtal fatigue stresses and therefore to piping failurts. Thus, the conditions addressed by hFC Eulletin 08-08 ore not lilely to occur at FSV.

The staff has reviewed ycur reatens as stated above end firds your response to this NRC Eulletin is acceptable.

Nc fur tter ection on your part is required.

Sincerely,

/s/

Kt t,r.e t h L. Pe it ner, Pro.ie't l'a nag (r Freject Directorate - IV Divisien of Reactor Projects - !!!,

IV, Y and Special Projects Office of i;uclear Feactor regulation cc: See rext page O!5TRIEllT10th Docket File FFC PCR Local PDF

!04 Frading

,' t. Rubt n' tein J. Calvo P. I'cenar.

K. Peitr.et s

P. T. ruo L. l'a rsh OCC rockville-E. Jordan C. Crires ACRS (10)

F04 Plant file t, d.. i t l

p p:c.

9Ad M

i EMEB M EMEB PD4/D /N C 004/LA I**

P04/FP Flicenan rFeitrtr:sr PTruo b **

Li'at sh JCalvc 11/2 /EE 11/ S BB ll/n/E8 11/751EE 11/2t/66 l

l sw>= :susig an g

F De

\\

November 22, 1988 e.

9 F,

Docket No. 50-267 Mr. R. O. Williams, Jr.

Senior Vice President, Nuclear Operatior.s Public Service Corpany of Colorado Post Office Box 640 Denver, Colorado 80201-0840

SUBJECT:

HRC BULLETIN NO. 88 08: THERMAL STRESSES IN PIPING C0hhECTED TO REACTOR COOLANT SYSTEMS We have reviewed your response dated October 26, 1988 to NRC Bulletin ES C8.

This bulletin was concerned with the potential for high thersi61 stresses to be developed in piping systems connected to the reactor coolant system of liSht water reactors.

Ycur response noted that ycu have coriducted an equhalent review cf this issue for Fort St. Vrain (FSV) gas ccoled reactor ecolant sy s tem.

Connecting auxiliary piping syster.s contain heliun., rather than water. Thesc systerns do not have conditions that wculd 1 tad to high therral fatigue stresses and therefore to piping failures. Thus, the conditions addressed by KFC Eulletin 08-08 are not lilely to occur at FSV.

The staff has reviewed your reasens as stated above ar.d finds your response tc this NRC Eulletin is acceptable.

Ec ft.rther action on your pt.rt is required.

Sincerely,

/s/

Ktor t th L. h itter, Project l'anager Project Directcrett - !Y Division of Reactor Projects - !!!,

!Y, Y and Special Projects Office of Nuclear F.eactor regulation cc: See next page DISTRIBUTION Docket FiTe' NRC PCR Local POR F04 Peading L. Rubenstein J. Calvo P. Neonan K. Heitrer P. T. kuo L. Marsh OCC-Rockville E. Jordan B. Grtres ACRS (10)

PD4 Plant File r, d e.n r b

M I

n:W PD4/FM g d EMEB >

EMEB PD4/0 / M C PD4/LA t

PNecnan KFeitrer:sr PTruo LMarsh JCalvo 11/2 t/f 8 11/ 6 88 11/15/68 11/ M EB 11/2t/68

]

,[(psameeg*'g UNITED 8TATt8 NUCLEAR REGULATORY COMMISSION 5

WASHINGTON O.C.39886

l November 22, 1938 Docket flo. 50-2(7 Mr. R. O. Williams, Jr.

Senior Vice President, Nuclear Operations Public Service Correart.' of Colorado Post Office Box 840 Denver, Colorado 80201-0840

SUBJECT:

NRt. BULLET 1N NO. BB-CE: TFERMAL STRESSES th I'IPlNG CU.hECTED TO FEACTOR CCCLALT SYSTEl'.S 14 f.n t reviewed e resrcr.se ('oter' Octcber 26 1988 to NRC Bulletin 08-CE.

This tbiletin was,vt.onctrr.ed with the poter.tial for high theroci stresses to be,

developed in pipitig syster.s ccia.tttet te the reactor coolant syster of light veter reactors. Your respor.se r.oted that ycu have conducted ar. equivalent review cf this issue for Fort St. Vrain (FSV) ges cteled riector coolant sy ster.

Connecting cuxiliary piptrg syster<s cor.tain helium, rether than water. These tyttst.s do ret have cor ditions that veuld lead tc tigh thtrr.cl fetigue i

i stretst s ar.d therefor t to pipitig fe titre s.

Thus, the conditior.s addressed by NRC Eulletin 08-C8 are not 116ely to cccur at FSV.

The staf t has reviewed your reasons as stettd abcve and finds your resper.se to I

this NFC Eulletin is accepteble. I'c further actice cr. Jour part is required, i

1 Sincerely, b Md.,%

~

m Kenneth L. l'cientt, Project Panager Project Directcrete - !Y Division of Reactor Projects - !!!,

IV, Y and Spar.ial Projects Office of Nuclear Reactor Regulation cc: See next page

)

t Mr. R. O. Williars, Jr.

Public Service Corpany of Colorado Fort St. 7ralii i

cc:

Pr. D. V. Varembourg, Manager e J.rt J. Harle, Director Muclear Engineering Division Radiation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201-0840 Mr. David Alberstein, Par.aser Mr. Charles H. Fuller Fort St. Vrain Services Manager, Nuclear Product.on GA International Services Corporatica at.d Stttit t Parager Post Office Box E!(C6 Public Service Corpany of Colorado San Diego, California 92138 16605 Weld County Road 19-1/2 Platteville, Colorado 80651 Fr. H. L. Brey, itanager Nuclear 1.icensing and Rescurce tir. P. F. Tomlinson, Pana0er itanagement Divisict.

Ruolity Assurance Division Fublic Service Corpany of Colorade Fublic Service Company of Colorade P. O. Box 840 16805 Veld County Road 19-1/2 Denver, Colorado 80201-0840 Platteville, Colorado 80651 Senior Resident Inspector Mr. D. D. Hock U.S. Nuclear Regulatory Comission President and Chief Exerative Officer P. O. Box 640 Fublic Service Cceperty of Colorado Flatteville, Colcratc FCf!1 Pcst Offict Ecx 840 Denver, Colorado 80201-0840 Kt11ey, Standf. eld t. O'Ocnnell ATTH: Mr. J. K. Tarpey Comitineret Control Program Fublic Service Cctpany Euildirg Cc c.rdiriator Room 900 rublic Service Cocpany of Colorade 550 15th Street 2420 W. 26th Ave. Suite 100 0 Denver, Colorado 80202 Denver, Colora e 0C211 Regional Adininistrator, Region IV U.S. Nuclear Fegulatcry Comission 611 Ryan Plaza Drive, Suite 1000 Arlinster, Texas 76011 Chairmen, Board of County Corsaissioners of Weld County, Colorado Greeley, Colorado 80631 regiorial Representative Radiation Progrttis Environtental Protection Agency 1 Denver Place 999 18th Street Suite 1300 Der.ver, Coloraco 802C2-2413