ML20236D377

Forwards Summary Rept:Reactor Containment Bldg Integrated Leak Rate Test,Point Beach Nuclear Plant Unit 1,1987. Results of Type B & C Leakage Tests Conducted Since Apr 1984 Type a Test Included in Rept.Discusses Rept Results

ML20236D377
Person / Time
Site:	Point Beach
Issue date:	07/22/1987
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20236D380	List: ML20236D377 ML20236D390
References
CON-NRC-87-76 VPNPD-87-319, NUDOCS 8707300429
Download: ML20236D377 (2)

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WISCONSIN Electnc mm coumr '

231 W. MICHIGAN P.O. BOX 2046, MILWAUKEE,Wl53201 (414)277-2345 VPNPD-87-319-

, NRC-87-76 July 22, 1987

-Document ~ Control Desk U.S. NUCLEAR REGULATORY COMMISSION Washington, D.C. 20555' Gentlemen:

DOCKET.50-266 POINT BEACH NUCLEAR PLANT, UNIT 1 FACILITY OPERATING LICENSE DPR-24 REACTOR < CONTAO4 MENT BUILDING INTEGRATED LEAK RATE TEST In accordance with Section 15.4.4.I.D. of the Point Beach Nuclear' Plant Technical Specifications and Section V.B. of 10 CFR150 Appendix J, a summary technical report on the Type A containment integrated leakage rate-test conducted during the 5 April 1987 Unit I refueling and maintenance outage'is enclosed.

The results of the Type B and Type C leakage tests conducted since the April 1984 Type A test are included.

1 The Type A test was performed by Bechtel Power Corporation; the report was reviewed and approved by Wisconsin Electric. The ,

complete report, including all procedures,. equipment calibration J records, test data, and results, is available at Point Beach for review. A summary report,' prepared in accordance with ANSI /ANS- l 56.8-1981, is enclosed herewith.

A routine, announced NRC inspection was conducted by Mr. R.

'Mendez during the performance of the Type A test. No items of i non-compliance or deviations were identified in Inspection Report No. 50-266/87008; 50-301/87008, dated April 29, 1987.

The overall, as-found, total time leakage rate for this Type A test was 0.297%/ day at the 95% upper confidence level. This value includes a 0.010%/ day correction for non-standard valve alignments, containment volume changes, gas additions to the containment, and a penalty of 0.155%/ day for the packing leakage from four. steam generator level transmitter isolation valves that were leak-tested and replaced with new valves prior to the B707300429 B70722 L PDR O

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i U. S. Nuclear Regulatory Commission July 22,-1987 Page Two l

l Type A test. They are not containment isolation valves but are j part of the containment boundary. The new valves were included l in the Type A test boundary. As a result of adding in the l penalty for these valves, the calculated leak rate for the as-found condition exceeds the allowable operational leak rate of'0.212%/ day. This was reported in Licensee Event Report (LER)

No. 87-002-00, dated May 6, 1987.

The overall, as-left, total time leakage rate for this Type A I test was 0.142%/ day at the 95% upper confidence level, i.e.,- l 67.0% of the allowable operational leakage rate. This includes a 0.010%/ day correction for r on -standard valve alignments, containment volume changes, end gas additions to the containment.

leakage of the Type B and C tests The overall, conducted as-found...985 during the refueling outage was 27,967 secm or 11.7% of 0.6L . After repairs, the overall, as-left, leakage rate was 11,138 Lecm or 4.7% of 0.6L a*

The overall, as-found, leakage of the. Type B and C tests l conducted during the 1986 refueling outage was greater than 164,420 seem or greater than 68.6% of 0.6L As described in LER No. 86-002-00, dated May 16, 1986, the" actual value could not be quantified because excessive leakage during one Type C test made it impossible to achieve test pressure. However, after repairs, the overall, as-left, leakage rate was 12,711 sccm or 5.3% of 0.6L a*

If you have any questions concerning this report, please feel free to contact us.

Very truly yours,

/

W-l "g

C. W. Fay Vice President Nuclear Power Enclosure Copies to Regional Administrator, Region III Resident Inspector