ML20053B178

Forwards Info Updating Special Rept Re Inoperable Fire Rated Assemblies & Sealing Devices.Info Summarizes Net Changes Since 820423

ML20053B178
Person / Time
Site:	San Onofre
Issue date:	05/14/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
NUDOCS 8205280146
Download: ML20053B178 (5)

Text

.

Southern California Edison Company lj5 S AN CNOFRE NUCLE A R GENER A TING S T A TION e.o. B o x saa

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-.6 S A N C L EME N T E. C A LIF OR NI A 92672 H. B. R A Y M L E PHON

-o May 14, 1982 um**a svario A Aana U. S. Nuclear Regulatory Commission

'Tj Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5328 Attention:

Mr. R. H. Engelken, Regional Administrator

Subject:

Special Report Regarding I,' I 4 incperable Fire Rated Assemblles anc Sealing Devicer

,;t 3 / - ? 3to Docket No. 50-361 Sar Onofre - Unit 2

Reference:

h)

Letter, H. B. Ray to R. H. Engelken, dated Apri1 23, 1982 This letter updates the Special Report of reference (a) and includes in the attached chart, an illustration of Fire Barrier Penetration activity since April 23, 1982. The following summarizes the net changes in the 20 days since the reference (a) report:

Item Description Totals Change 4/23/82 5/13/82 1.

Total number of seals inoperable and requiring fire watches:

1,080 1,188

+108 2.

Total number of seals restored and con-l sidered operable by contractor QC:

876 1,073

+197 3.

Total number of seals physically inoperable:

204 115

-89 4.

Total number of sea t s physically in-operable for a period of less than seven (7) days:

38 29

-9 i

l l

II 820 5 280 j '(G

l Mr. R. H. Engelken May 14, 1982 Item Description Total Change 4/23/82 5/13/82 5.

Total number of seals physically in-operable for a period of seven (7) days or more:

166 86

-80 6.

Total number of seals physically in-operable for a period of thirty (30) days or more:

88 24

-64 7.

Unit 2 physically inoperable seals:

52 14

-38 8.

Unit 2 & 3 common barriers - physically inoperable seals:

152 101

-51 The increase in categories one (I) and two (2) above represent the in-crease in the rate of restoring physically inoperable penetration seals without a corresponding increase in the rate of final inspection and acceptance by station maintenance and QA.

Seals in category 2 above have been restored and accepted by the contractor's QA organization but have not been finally inspected and accepted by qualified personnel in accordance with a station approved inspection procedure. These seals are therefore considered inoperable by Technical Specification and are included in the penetration seals surveilled by continuous fire watch or hourly fire watch patrols, even though the seals have been physically restored. Particular atiention is currently being emphasized in this area and numbers in this category will decrease significantly in the next reporting period.

As can be seen by the above table and the attached, the total number of physically inoperable fire barrier penetration seals has been reduced by nearly 45%, from 204 to 115, in this 20 day reporting period. The total number of seals physically inoperable for greater than seven days has been reduced by nearly 50%, from 166 to 86.

Efforts are continuing to reduce the total number of physically inoperable seats with the goal of eliminating inoperable penetrations in fire barriers exclusive to Unit 2, prior to initial criticality.

Fire barriers common to Units 2 and 3 will cor,tinue to have inoperable penetrations, primarily in the common control building and radwaste areas, as Unit 3 construction continues.

Mr. R. H. Engelken May 14, 1982 Our next Special Report update wiII be made on June iI, 1982 and wili provide Fire Barrier Penetration status through June 10, 1982.

If there are any questions regarding the above, please contact me.

Sincerely,

/ cLGv's,

/

/

Enclosure cc:

A.E. Chaffee (USNRC Resident inpsector - San Onofre Unit 2)

O Mr. R. H. Engelken May 14, 1982 bec: OSRC Members (9)

R. Dietch J. G. Haynes H. B. Ray K. P. Baskin/M. O. Medford J. M. Curran /D. B. Schone D. E. Nunn/H. L. Richter W. C. Moody W. W. Strom C. R. Kocher/J. A. Beoletto D. R. Piggat, Esq. (Orrick, Herrington & Sutcliffe)

P. A. Croy/T. A. Mackey, J r.

H. E. Morgan J. Tate N. Ferris D. P. McCloskey/C. Seward B. Katz J. J. Wambold T. Cutler (Bechtel)

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