ML19294B718

Responds to IE Bulletin 80-01, Operability of Automatic Depressurization Sys Valve Pneumatic Supply. Facility Sys Consists of Five Electromatic Relief Valves.Bulletin Does Not Apply

ML19294B718
Person / Time
Site:	Oyster Creek
Issue date:	01/23/1980
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-80-01, IEB-80-1, NUDOCS 8003050410
Download: ML19294B718 (1)

Text

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Jersey Central Power & Light Company 4

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Madison Avenue at Punch Bowl Road

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Mornstcwn, New Jersey 07960 (201)455-8200 January 23, 1980 Mr. Boyce H. Grier, Director Office of Inspection and Enforcement Unit =u States Nuclear Regulatory Commission Region I 631 Park /, venue King of Prussia, Pennsylvania 19406

SUBJECT:

Oyster Creek Nuclear Generating Station Docket No. 50-219 1.E. Bulletin No. 80-1 The purpose of this letter is to respond to 1.E. Bulletin No.

80-1 which is concerned with the operability of the pneumatic supply for the valves in Automatic Depressurization Systems (ADS).

The ADS at the Oyster Creek Station consists of five electromatic relief valves.

Therefore, the concerns of I.E. Bulletin 80-1 are not applicable.

Ve truly yours,

)gw&l - l &'

Donald A. Ross, Haaager Generating Stations-Nuclear ck cc: United States Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations inspection Washington, DC 20555 8003050 Jersey Central Power & Light Company is a Member of the General Public Utiltties System

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ENCLCSURE 1 UNITEC STATES SSINS No.-

6870 NUCLEAR REGULACORY LCMMISSION Accessions No.:

0FFICE OF INSPECTICN AND ENFORCEMENT 7912190652 WASHINGTON, D.C. 20555 IE Bulletin No. 80-01 Date: January 14, 1980 Page 1 of 2 OPERABILITY OF ADS VALVE PNEUMATIC SUPPLY On January 10, 1980, the NRC was informed by Philadelphia Electric Company that engineering evaluation for Peach Bottom 2 and 3 has disclosed that the Automatic Depressurization System (ADS) pneumatic supply (either nitrogen or air) may not be operable for all possible events because of a combination of misapplication of check valve, a lack of leak testing of the accumulator system backing up each ADS valve operator and questions about the continued operability of the pneumatic supply in a seismic event.

Attached is a simplified schematic of the pneumatic supply.

The check valve nearest to the accumulator is a PAL, three quarter inch, stainless steel, socket welded check valve with a hard-seat (valve identification-B-1376 on the upper flange).

Plant infomation at Peach Bottom shows substantial supports for the pneumatic supply inside the drywell, but seismic qualification has not been verified.

The licensee has stated that the pneumatic supply is not seismically qualified outside the drywell.

Unit 2 was shutdown on 1/10/80 because of questions of ADS operability and Unit 3 has been provided a seismically qualified nitrogen supply at the contai ment

. penetration pending confirmation of seismic qualification of piping inside Unit 2 containment.

The licensee is changing their valve to one with a soft seat to reduce leakage.

Actions to be taken by Licensees of GE BWR facilities with an operating license which use a pneumatic operator for ADS function:

1.

Determine if your facility has installed hard-seat check valves to isolate the ADS accumlator system from the pneumatic supply system.

2.

Determine if periodic leak tests have been performed on your ADS accumulator systems to assure emergency pneumatic supply for the FSAR-required number and duration of valve operations.

3.

Review seismic qualifications of the ADS pneumatic supply system:

(a) from accumulator system isolation check valve to ADS valve operator, (b) from isolation valve outside containment up to ADS accumulator check valve.

4.

Based upon determination of items 1, 2 and 3 above, evaluate operability of the ADS for the conditions under which it is required to be operable including a seismic event.

If operability cannot be established adhere to appropriate Technical Specification action statement.

T:

IE Bul.letin No. 80-01 Cate: January 14, 1980 Page 2 of 2

2:iate notification 20 the NRC in tne event the A05 is fcund 3-a 'n :: era::le.

.rev ice a response in writing by January 18, 1950, for those facilities

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which use a pneumatic operator for ADS function.

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s.gerts should be submitted to the Director of the appropriate NRC Regional Office a-d a ecpy should be forwarded to the U.S. Nuclear Regulatory Commission, Office of Inspection and Enforcement, Division of Reactor Operations Inspection, Washington, D.C.

20555.

Aoproved by GAO, B180225 (R0072); clearance expires July 31, 1980.

Approval was given under a blanket clearance specifically for identified generic problems.

Attachment:

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