ML20083Q615

Ro:On 830215,both Trains of Control Room Filtration Unit & a Train Penetration Room Filtration Sys Failed to Meet Tech Spec Criteria for Carbon Efficiency.Caused by Misinterpretation of Reg Guide 1.52

ML20083Q615
Person / Time
Site:	Farley
Issue date:	02/16/1983
From:	Hairston W ALABAMA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
FNP-83-0180, FNP-83-180, NUDOCS 8302280211
Download: ML20083Q615 (2)

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h AlabaniaPower ase~me = ,-em 83 FEB 23 A10:0 I P.O. Drawer 470 Ashford, AL 36312 FNP-83-0180 February 16, 1983 Mr. J. P. O'Reilly, Director U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W.

Atlanta, Georgia 30303

Dear Mr. O'Reilly:

This is to confirm the telephone call to Mr. F. Cantrall (NRC) at approximately 1325 on February 16, 1983 by Mr. J. D. Woodard (APCo) in accordance with Tech. Spec. 6.9.1.12.b.

At 1700 on 2/15/83, it was determined that both trains of the Control Room filtration unit and the "A" train Penetration Room Filtration System had previously failed to meet Tech. Spec. criteria for carbon efficiency due to a possible misinterpretation of Regulatory Guide 1.52. The assigned activated carbon decontamination criteria of 95% had been used in the analyses of test samples of used activated charcoal instead of the laboratory test criteria of 99% as indicated in table 2 of Regulatory Guide 1.52. New activated charcoal had always been tested to the 99% criteria.

During the week of January 31st, while reviewing a rdraft Tech.

Spec. revision, the possibility of a misinterpretation of the regulatory guide requirements was discovered. Rather than waiting for an evaluation to be completed, the Unit 1 "A" train Penetration Room Filtration System and the "A" train Control Room Filtration Unit filters were replaced as a precautionary measure on 2/5/83 and tested satisfactorily.

A summary of past test results is illustrated in the attachment.

Further details will be provided in a followup report.

Sincerely yours,

,J ~-r W.~ Hairston, III' WGH/RWO:sjp cc: H. O. Thrash ~

R. G. Berryhill W. G. Ware t OFFICIAL L,01 ,, .

L. S. Williams W '~ '

8302280211 830216 8 PDR ADOCK 05000348 G PDR

1 Qs ATTACHMENT 1

SUMMARY

OF TEST DATA POSSIBLY MISINTERPRETED BY REGULATORY GUIDE 1.52 Methyl Freon Iodide Test Test Comments

Unit 1 "A" Train 7/30/82 98.24% 99.99% Clurcoal replaced. on Penetration Room 2/5/33 as a:

Filtration System precautionary measure.

"A" Train 10/19/79 98.42% 99.99% Charcoal-replaced on

. . Control Room 1/28/81 98.63% 99.99%- 2/5/83 as'a Filtration Unit 7/30/82 95.19% 99.99% precautionary measure.

I "B" Train 1/28/81 95.39% 99.99%

Control Room Filtration Unit 8/19/82 92.55%* Charcoal replaced-on 8/31/82 based on test results.

8/31/82 99.99%

• LER 82-052/03L-0 (Unit 1) submitted on this test.

References:

1) Regulatory Guide 1.52, Revision 2, March 1978

2) ANSI N509-1976

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