HL-3133, Forwards Reactor Containment Bldg Ilrt,Unit 2 - Fourth Periodic Summary Rept

Forwards Reactor Containment Bldg Ilrt,Unit 2 - Fourth Periodic Summary Rept

ML20128F672
Person / Time
Site:	Hatch
Issue date:	02/02/1993
From:	Beckham J GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20128F677	List: HL-3133, Forwards Reactor Containment Bldg Ilrt,Unit 2 - Fourth Periodic Summary Rept ML20128F678
References
HL-3133, NUDOCS 9302110503
Download: ML20128F672 (2)

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, Jte swerusac wem-Q,>> l' Tebruary L-2, ;1993 n

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U.S; Nuclear. Regulatory Commission

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% Edwin I. llatch Nuclear Plant - Unit'2 s

- Reactor Containment Building.

r ,' 'Intearated Leak Ra.t3 Test

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JIn accordance with the: requirements of 10 CFR 50, Appendix.J ;Section.

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' V.B.1, Georgia: Power Company (GPC) is; submitting-the enclosed summarys atechnical 4eportifor the< Integrate 1 Leak Rate TestL(ILRT) conducted on . . . .

iC iUniti r during the Fall:1992-Maintenaace/ Refueling Outage. Section 2 of the-g7' Ereport providesiaisummary of the ILRT.~resultsL ; The'as-left ' leakage' rate -  ?

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was!0.8858 weight percentjperiday which is<within- the' acceptance criteria ; , -

ARg 4 of 0.9 weightipercent per day; .75La),+/This value includes leakage:

L penalties?addedTto the1951 perce(nt: upperf confidence. limit to: account'" for:

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penetrationsJin: nonstandard alignments and forcwater inventory changes.

Appendix.II to the report provides!acsummary of-the periodic: Type;B and .

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a gype C1 tests 1. performed; since thellast ILRT:was-performed in 1989.

Mv" LAsM ndicatedlini ection 2'of the report,~.theLas-found leakage rite was ,

_ Lgreater than the. acceptance limit ofs1.20: weight percent pe_r day. The 1 1

'4 i  ; as-found leakage rate:was calculated to;be11.3357 by adding the minimum jm t. ,? 1 pathway-improvements- of'.0i4499 weight percenti per day. to- the .as-left g#NO leakage); rate. Veference LER;50-366,:1993-01.):

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)0fthe50.4499 weightipercentiper day minimum pathway improvementJaddition, 10.3307; weight;; percent-:per day was: attributed to. penetration 15/222Biin the' 3v him *r , hydrogen:recombiner system. The failure of the as-found :ILRT results toi my -r  : meet 7thenacceptanceLcriteria'is primarily at.tributed to..the large leakage:

Ew , fcontribution;ofc this; penetration. TPrevious test results on the= subject.

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M penetration' indicate that'no-trend.in leakage has occurredLin--the ipast.-

The= penetbation'addedionly:0.0066: weight percent per day :to: the minimum  :

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ypathway improvement addition,during the 1989 Unit 2 ILRT results z

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-U.S. Nuclear _ Regulatory Commission Page 2 February 2, 1993:

Based on the penetration's previous performance and historical test results, the failure is considered to represent an isolated case.

Corrective actions were implemented on one primary. containment isolation-valve within the oenetration and additional corrective actions were implemented on components in the associated closed system which provides the second isolation barrier. There are no indications that'large leakages would be expected from this penetration in the future. Consequently the current schedule for performing future ILRTs on Unit 2 will be maintained.

The next ILRT on Unit 2 will be performed during the Fall 1995

~ Maintenance / Refueling Outage which also corresponds to the schedule for the 10-year plant inservice inspections.

Five copies-of the report are enclosed If you have any questions in this regard, please call this office.

Sincerely,

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J. T. Beckham, Jr<. ,

JKB/cr Enc 1osure: Reactor Containment Building

-Integrated Leak Rate Test for Unit 2 cc: Etqtgia Power Company

' Mr. H. L. Sumner, General Manager - Nuclear Plant HORMS' U.S. NuS]Sar Reoq]atory Cqmmission. Washinoton. 0.C2 Mr. K. Jabbour, Licensing Project Manager - Hatch U.S. Nuclear _ Reaulatory Commission. Reaiqn_[1 Mr. -S. D. Ebneter, Regional, Administrator Mr. L. D. Wert, Senior Resident inspector - Hatch A

HL-3133

004790-