ML20203E869

Submits RAI Re Plant 970902 Request for TS Amend Re Auxiliary Feedwater Sys

ML20203E869
Person / Time
Site:	Wolf Creek
Issue date:	12/10/1997
From:	Thomas K NRC (Affiliation Not Assigned)
To:	Maynard O WOLF CREEK NUCLEAR OPERATING CORP.
References
TAC-M99538, NUDOCS 9712170215
Download: ML20203E869 (4)

Text

'- (- y 32 f....%

3 . ~* *a UNITED STATES

. j j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30MH001 o,

%, . . . . . *d[

December 10, 1997 Mr. Otto L, Maynard President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, Kansas 66839

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR WOLF CREEK GENERATING STATION (TAC NO, 99538)

Dear Mr. Maynard:

The staff has reviewed Wolf Creek Generating Station's (WCGS) September 2, 1997, request for technical specification amendment Jertaining to the auxiliary feedwater system and has determined that tle following additional information is needed to complete the review:

1, Define the physical beginning and end of the ESW " supply" or "flowpath" to the turbine-driven auxiliary feedwater (TDAFW) pump that would apply under the 7 day allow outage line (A0T).

2. In the background section "ESW Flow Path Required Action," of Attachment I, WCGS justifies the 7 day A0T, in part, because of the remaining operable motor-driven (MD) AFW pump. This statement refers to a singular 3DAFW pump, not to two pumps. If one ESW supply to the TDAFW pump is inoperable, is the associated MDAFW pump operable or ino>erable?

If the ESW supply to the MDAFW pump is inoperable, explain why t7e A0T should not be 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> due to one inoperable AFW train.

3. In Section B 3.7.5.C.1 of Attachment V, WCGS 3roposes, in part, to change the TS Bases to state that gne inoperaale AFW train includes the loss of two ESW supply lines to the TDAFW pump. From this statement, one concludes that if the two ESW supply lines are lost to the TDAFW pump, both MDAFW pumps are unaffected and can provide the required amount of ESW to the steam generators. Is this conclusion correct? If not, please provide clarification, if so, how does WCGS ensure that the inoperable ESW supply to the TDAFW pump does not affect the ESW supply to the MDAFW pumps?

I 9712170215 971210 PDR ADOCK 05000482 pm3 m

.g 4

• u b[ ft ;h b i,w

! l!

.~.. .,',Al :4

o .

Mr. Otto L. Maynard -2 December 10, 1997 To assist the staff in maintain:ng its review schedule, please )rovide a written response to this request for additional information witlin 30 days of receiptofthisletter. If you have any questions, please contact me at (301) 415-1362. .

Sincerely.

ORIGINAL SIGNED BY Kristine M. Thomas, Project Manager Project Directorate IV-2 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50 482 DISTRIBUT'03 Docket f1 e cc: See next page PUBLIC~

PDlV-2 Readir.g EGA1 WBateman KThomas EPeyton OGC, 015B18 ACRS DJackson, SPLB TMarsh, SPLB TGwynn, RIV DOCUMENT NAME: WC99538.RAI 0FC PDIV-2/PM PDIV-2/LA NRR:SPLS.

NAME KTh$$aY:ye EFEy1Y TMarshff DATE 12/10/97 12/1097 12/lo/97 av5I 0FFICIAL RECORD COPY i

o C

o Mr. Otto L. Maynard To assist the staff in maintaining its review schedule, please arovide a written response to this request for additional information wit 11n 30 days of receipt of this letter. If you have any questions, please contact me at (301) 415 1362.

Sincerely, Qw(YTThomo%

Kristine M. Thomas, Project Manager Project Directorate IV-2 .

Division of Re6ctor Projects Ill/IV Office of Nuclear Reactor Regulation Docket No. 50 482 cc: See next page

..+r .. _ . _uu m _ ,a.. - ..- -1._.:.,.au_.2...& . -- . . - _ . . _ .s. - m .m& .-

. Mr. Otto L. Maynard -

3- ,

i CC: -

Jay Silberg. Esq. - Chief Operating Officer  :

Shaw. Pittman. Potts & Trowbridge Wolf Creek Nuclear Operating Corporation 1 2300 N Street. NW P. O. Box 411 Washington.-D.C. 20037 - Burlington. Kansas 66839-Regional Administrator. Region IV Supervisor Licensing  ;

U.S. Nuclear Regulatery Comission Wolf Creek Nuclear Operating Corporation- t 611 Ryan Plaza Drive. Suite 1000 P.O. Box 411 Arlington. Texas 76011 Burlington, Kansas 66839  ;

Senior Resident Inspector U.S. Nuclear Regulatory Commission ,

U.S. Nuclear Regulatory Commission Resident Inspectors Office P. O. Box 311 8201 NRC Road-  :

Burlington. Kansas 66839 Steedman. Missouri 65077-1032 Chief Engineer l Utilities Division Kansas Corporation Commission 1500 SW Arrowhead Road Topeka, Kansas 66604-4027 Office of the Governor State of Kansas '

Topeka. Kansas 66612 Attorney General Judicial Center 301 S.W. 10th 2nd floor 3 Topeka. Kansas 66612 County Clerk Coffey County Courthouse Burlington. Kansas 66839 Vick L. Cooper. Chief Radiation Control Program Kansas Department of Health and Environment.

Bureau of' Air and Radiation

- Forbes Field Building 283-Topeka, Kansas _66620