ML18019A386

Provides Addl Info Re Ability to Place Plant in Cold Shutdown Condition Considering Limiting Single Failure,Per SER Confirmatory Item 36 on Steam Generator Tube Rupture. Depressurization Utilizes Auxiliary Spray Line

ML18019A386
Person / Time
Site:	Harris
Issue date:	09/13/1985
From:	Zimmerman S CAROLINA POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM NLS-85-331, NUDOCS 8509230296
Download: ML18019A386 (3)

Text

REGULAlY INFORMATION DISTRISUTIO>>YSTEN (RIDE)

>>'CCESSION NBR;8509230296'OC DATE: 85/09/,13 NOTARIZED'O DOCKET FACIL:50 400 Shearon Harris Nuclear Power>> Planti Unit li Carolina 05000400 AUTH ~ NAME>> . AUTHOR AFFILIATION ZIMMKRMANiS, R ~ Car o l ina Power 8 Li ght Co ~

RECIP ~ NAME'EC1P IENT AFF IL>>IATION DENTONiH,R< Of f i ce- of Nuclear Reactor Regul ationi Oir ector

SUBJECT:

Provides addi info re ability to p)ace plant in cold.

shutdown. condition'onsidering limiting single failureiper

'SER Confirmatory Item 36 re steam generator tube ruptures Depr essurization utilizes auxiliary spray line.

DISTR'I BUTION CODE ~ '00 1 D COP IES RECEI VED: L>>TR ENCL SIZE:

TITLE': Licensing Submittal: PSAR/FSAR Amdts- 8, Related Correspondence NOTES:

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CIGAR Carolina Power & Light Company SERIAL: NLS-85-331 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 - DOCKET NO.50-000 COLD SHUTDOWN CAPABILITY

REFERENCE:

CPRL letter from M. A. McDuffie (CP&L) to H. R. Denton (NRC),

LAP-83-350 dated August 11, 1983.

Dear Mr. Denton:

Carolina Power dc Light Company (CP&L) submits additional information regarding the Shearon Harris Nuclear Power Plant (SHNPP) ability to place the plant in a cold shutdown condition considering a limiting single failure. This information is also pertinent to Safety Evaluation Report Confirmatory Item 36, regarding steam generator tube rupture. This submittal is made at the request of a Reactor Systems Branch reviewer specifically requesting information on suitable plant systems to provide the function of depressurization to achieve a cold shutdown condition. The reference letter also discusses this subject in response to DSER Open Item 09.

For SHNPP, the primary means of Reactor Coolant System (RCS) depressurization (considering a limiting single failure) is by utilizing the pressurizer auxiliary spray line, which is a portion of the Chemical and Volume Control System. The fluid flow path is via the centrifugal charging pumps and the auxiliary spray valve to the pressurizer. The normally closed auxiliary spray valve fails closed on loss of air, but will be readily accessible to operating personnel and can be opened in 0-6 hours by using a pressure regulated portable air supply. The backup means of RCS depressurization is via the pressurizer power-operated relief valves (PORVs). These valves have been demonstrated operable under seismic and post-seismic conditions under the Westinghouse pump and "

valve operability program. Additionally, a SHNPP specific PORV was tested under the EPRI operability and reliability test program (NUREG-0737, Item II.D.l).

If you have any questions, please contact Mr. Gregg A. Sinders at (919) 836-8168.

Yours very truly, 850q2SoaqS 8509<~

PDR ADOCN, 05000400,,

E PDR S. R im erman a ger Nuclear Licensing Section GAS/ccc (1800GAS)

CC: Mr. B. C. Buckley (NRC) Mr. Daniel F. Read (CHANGE/ELP)

Dr. 3. Nelson Grace (NRC-RII) Mr. Wells Eddleman Mr. B. Mann (NRC-RSB) Mr. 3ohn D. Runkle Mr. T. Marsh (NRC-RSB) Dr. Richard D. Wilson Mr. G. F. Maxwell (NRC-SHNPP) Mr. G. O. Bright (ASLB)

Mr. B. Shearon (NRC-RSB) Dr. 3. H. Carpenter (ASLB)

Mr. Travis Payne (KUDZU) Mr. 3. L. Kelley (ASLB)

Wake County Public Library 411 Fayettevitte Street o P. O. Box 1551 o Raleigh, N, C. 27602