ML20054G264

RO 82-20:on 820604,required Demonstration of Personnel Air Lock Operability Not Performed within Required Surveillance Interval.Caused by Miscalculation of Allowable Time Interval

ML20054G264
Person / Time
Site:	San Onofre
Issue date:	06/10/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-82-20, NUDOCS 8206210347
Download: ML20054G264 (2)

Text

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Southern California Edison Company - IgfE S AN ONOFRE NUCt.E AR GENER A TING ?T A TION kL

• P .O . B O A $20 wg S A M C LEMENT E. C A LIFORNI A 92672 H.3. RAY TELEPHONE-ST Af f 0N M AN AGg n (Ps4) ggg.y y00 June 10, 1982 U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 - 5368 Attention: Mr. R. H. Engelken, Regional Administrator

Subject:

Do:ket No. 50-361 Licensee Event Report tio. 82-20 San Onofre Nu: lear Generating Station, Unit 2 In accordance with Technical Specification 6.9.1.12.b, this letter confirms our prompt notification of your of fice by telephone on June 9,1932, of a reportable occurrence involving a missed surveillance requirement on the Personnel Hatch.

I I On June 4,1982, U it 2 entered Mode 4 at 17:00 hours and the Personnel Air Lock was opened for multiple entries. Tecn ical Specification 4.6.1.3 requires that the air lock shall be demonstratet operable within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> following each closing, except when the air lock is being used for multiple ,

entries, then at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. This demonstration, therefore, was-required to be completed by 17:00 hours on June 7,1982. Technical Specification 4.0.2.a al'ows this time to be extended 25*J which would have required the demonstration of operability of the Personnel Hatch by 13:00 hours on June 8,1932. The need for the test was noted by Operatio.is personnel but the required completion time was miscalculated. On June 9, 1932 at 08:15 hours it was suspected that the test was not performed within the

, required surveillance interval and action was taken to perform the test immediately. On June 9, 1982 at 09:15 hours the Personne! Hatch was de:ronstrated operable.

The oversight was due to miscalculation of the allowable time interval.

T&7 8206210347 820610 '

gDRADOCK 05000361 PDR

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-g-Mr. R. H. Engelken June 10, 1982 Corrective measures include instructions to operations personnel on the need to follow surveillance requirements stringently, and steps to assure that tests be conducted by identifying NO LATER THAN times.

A completed LER form addressing this. event will be provided by June 22, 1982. If there are any questions regarding the above, please contact re.

4 Sincerely,

[ .

cc: A. E. Chaffee (USNRC Resident Inspector San Onofre Unit 2) 4 4

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