ML19257C356
| ML19257C356 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 01/11/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | John Miller GEORGIA POWER CO. |
| References | |
| NUDOCS 8001280482 | |
| Download: ML19257C356 (1) | |
Text
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UNITED STATEF NUCLEAR REGULATORY CLMMISSION sE REGION 11
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101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, G EORGIA 30303 In Reply Refer To:
JAN 1 1-RII:JPO M, 50-366 ] ;*
1 Georgia Power Company Attn:
J. H. Miller, Jr.
Executive Vice President 270 Peachtree Street, N.W.
Atlanta, Georgia 30303 Gentlemen:
Enclosed is IE Bulletin No. 80-01 which requires action by you with regard to your BWR power reactor facility (ies) with en operating license.
Should you have questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely,
~g James P. O'Reilly Director
Enclosures:
1.
IE Bulletin No. 80-01 2.
List of Recently Issued IE Bulletins
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em 1825 139 soo12so
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Georgia Power Company cc w/ encl:
M. Manry, Plant Manager Post Office Box 442 Baxley, Georgia 31513 C..E. Belflower Site QA Supervisor Post Office Box 442 Baxley, Georgia 31513 W. A. Widner, General Manager Nuclear Generation Georgia Power Company 1
Post Office Box 4545 Atlanta, Georgia 30303 4
P o
!825 140
UNITED STATES SSINS No.: 6870 NUCLEAR REGULATORY COMMISSION Accessions No.:
OFFICE OF INSPECTION AND ENFORCEMENT 7912190652 WASHINGTON, D.C. 20555 January 11, 1980
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j IEBallhtinNo.80-01 3
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) pneumetic supply (either nitrogen or air) may not be operable fo 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 tLe 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 information at Peach i,attom shows substantial supports for the pneumatic supply inside the drywell, but seismic qualification has not been verified. The licensee has state 3 that the pneumatic supply is not seismically qualified outside the. J gwell.
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 containment pnetration 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, 3 (b) from isolation valve outside containment up to ADS accumulator check y
valve.
r 4.
Based upon determination of items of the ADS for the conditions unde DUpLICA*E DOCUMENT including a seismic event.
If ope to appropriate Technical Specifica Entire document previously entered into system under:
ANO 4}
No. of pages:
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