ML17255A301

Discusses Analysis Used to Meet Current SRP Seismic Criteria for Refueling Water Storage Tank (Rwst),Per SEP Topic III-6. Preliminary Results W/Input & Acceptance Parameters Encl. Final Analysis Will Be Available by 830715

ML17255A301
Person / Time
Site:	Ginna
Issue date:	06/16/1983
From:	Maier J ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D Office of Nuclear Reactor Regulation
Shared Package
ML17255A302	List: ML17255A301 ML17255A303
References
TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8306240311
Download: ML17255A301 (42)

Text

REGULATOR NFORMATIOA DISTRIBUTION EM (RIDS)

AGCESS ION NBR; 8306200311- DOC ~ DATE; '83/06/16 NOTARIZED! NO DOCKET

,FAGIL!50 240 Rober t Emmet. Ginna Nuclear '~Planti Uni]t .1i Rochester G 05000244 AUTH'AME AUTHOR AFF ILIATION MAXERr J ~ E ~ Rochester Gas 8 iEl ectr ic,Cor p,

'REC IP ~ NAME RECIPIENT AFFILIATION CRUTCHFXELDrD ~ Operating Reactors Branch '.5 "SUBJEOT: Discusses -analysis used <to meet current SRP iseismic criteria for,refuel<rig water storage tank (RHST) .per "SEP Topic III 6, Pnelimi.nary resul~ts w/input '5 acceptance parametens will be avail-able, by 830715, encl'inal-analysis DISTRIBUTION ~CODE! A028S (COPXES -RECEIVED:LTR, ENCl ( SIZEL"

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Subject:

SEP Topic III-6, Seismic Qualification of Tanks R. E. Ginna Nuclear Power Plant Docket No. 50-244

Dear blr. Crutchfield:

By letter dated January 14, 1982, RGGE stated that because the RWST did not meet current Standard Review Plan (SRP) seismic criteria, we planned to implement modifications. Since that time, RGRE has undertaken another analysis, using input criteria and acceptance criteria formulated for Ginna and other SEP plants during the course of the Systematic Evaluation Program. The preliminary results, together with the input and acceptance parameters, are included as Attachment A. As denoted in that analysis, RGEE considers that the RWST will not buckle, and should be acceptably anchored as well. The final certified analysis will not be available until approximately July 15, 1983.

However, RGSE will commit to make any modifications deemed necessary by the results of the final analysis.

In RG6E's April 11, 1983 letter, we stated that the sodium hydroxide tank did not meet current SRP seismic criteria. However, the modifications required to meet current criteria were simple enough that the performance of a more refined analysis was not considered warranted. RGGE thus committed to perform the modifi-cation by the end of the 1984 refueling outage. For information RG&E has included, as Attachment B to this letter, the design criteria used in the'nalysis.

Finally, in the December 1982 Final Integrated Plant Safety Assessment. Report for Ginna, it was noted that the only tank of concern with respect to flooding of safety-related equipment was the 75,000 gallon reactor makeup water tank. A more detailed review of all tanks in the auxiliary building has disclosed that additional tanks should have been seismically analyzed, since 83062403ii 05000244 8306i6 PDR ADOCK PDR P

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., ROCHESTER GAS AND ELEC/RIC CORP. SHEET NO.

oATE June 16 198 Mr. Dennis M. Crutchfield their col lective failure, although not anticipated, could cause flood-related damage to safe shutdown equipment. The entire list of tanks, their capacity, and seismic qualification is provided in Attachment C. Also included is the net floor area of the auxiliary building basement, and the limiting height of safe shutdown equipment. Based on this evaluation, RG6E has concluded that the three CVCS Holdup Tanks should be seismically qualified, or prevented from impacting the safe shutdown equipment in the basement of the auxiliary building. The schedule for providing our resolution of the seismic qualification of these tanks is July 15, 1983. Based on the results of the analysis, which will use input and acceptance criteria previously found acceptable for SEP review, RGGE will modify the tanks, or prevent the content of the tanks from affecting vital safe shutdown equipment.

Very truly yours, Jo n E. Maier

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RHST Information Total Volume = 338,000 gal.

Normal = 300,000 gal.

Tech Spec Min = 230,000 gal Bottom of RNST: 236'2" I

Pump Inlet Nozzle

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- ;10% Level: 244'6" I31% Level: 262'0" Tank I.D. =

= 4,110 26.45'olume/Ft gal.

Volume to 'Pump Inlet Nozzle = 6,165 gal.

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