ML20040B208

Final Deficiency Rept Re Mfg Defects in Lower Subassembly of Biological Shield,Initially Reported on 810915.Conditions Not Considered Reportable Per 10CFR50.55e

ML20040B208
Person / Time
Site:	05000355
Issue date:	12/31/1981
From:	Martin T Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8201250269
Download: ML20040B208 (2)

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Thomas J. Martin Pubhc Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 201/4304316 vice Presdent Mailing Address: P.O. Box 570, Newa rk , N.J. 07101 E ngineering ard Construction December 31, 1981 Mr. R. C. Haynes, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement O Region 1 j{ {f. d[j l, 631 Park Avenue j3 King of Prussia, Pennsylvania 19406 [sp

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Dear Mr. Haynes:

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• v POTENTIAL SIGNIFICANT CONSTRUCTION DEFICIENCY N' BIOLOGICAL SHIELD MANUFACTURING DEFECTS 4 /

NO. 2 UNIT (50-355) ./,'

HOPE CREEK GENERATING STATION

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On September 15, 1981, a verbal report was made to Region 1, Office of Inspection and Enforcement representative, M r. S.

Chardha ry , advising of a potential significant construction deficiency concerning manufacturing defects in the lower subassembly of the Unit #2 biological shield. The item was manufactured by PX Engineering Company of Woburn, Ma s sa chu-setts. On October 8, 1981, an interim report was submitted which outlined investigative and corrective steps initiated by PSE&G.

The following are the results of these actions. The infor-mation is correlated to match the description of deficiency in our October 8, 1981 letter. No additional defects were identified by reinspection.

1. Engineering Evaluation a) & b) - Undersize fillet welds and insufficient pro-jection of penetration sleeves: It has been

' determined that the existing conditions meet the design requirements because an adequate design margin exists to accommodate the loading.

c) - Shear Tie Bolts Not Stamped: Based on docu-mentation (CMTR's) provided by the Supplier, the shear tie bolts meet specification requirements.

8201250269 811231 PDR ADOCK 05000355 S PDR O

c Mr. R. C. Haynes 12/31/81 d) - Portion of Full Penetration Weld Omitted:

Based on Engineering evaluation, the existing conditions meet the design requirements be-cause an adequate design margin exists to ac-commodate the loading. However, when field welds are to be accomplished on the unit, the vertical weld will be completed to agree with original design configuration.

e) & f) - Linear Indications in the Corners of Anchor Bolt Hole Windows and Added Welds Not Shown on Design Drawings: The welds at the corners of bolt inspection windows are construction aids only to facilitate welding of the closure plates. However, the indications will be re- 1 moved and the welds repaired.

g) - Gaps Between the Inside Surface of tne Outer Shell and the Type III H&V Penetrations:

These gaps have been determined to have an in-significant impact on the structural integrity of the penetrations, because an adequate mar-gin exists to accommodate the loading. How-ever, when field welds are to be acccmplished, the leg size of all fillet welds used on outer shell to H&V penetrations will be increased, which will restore the effective weld leg size to original design.

2. Based on Engineering evaluation of the noted deficien-cies, it is concluded that the conditions would not have adversely affected safe operation of the plant had they gone uncorrected. Therefore, none of the conditions are considcred reportable in accordance with 10CFR50.55(e).

Please cancel this item as a potential significant defi-ciency. Should you have any further questions, we will be pleased to discuss them with you.

Very truly yours, lg CC: Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D. C.

NRC Resident Inspector - Hope Creek P.O. Box 241 Hancocks Bridge, N.J. 08038