ML19209A698

Forwards Response to IE Bulletin 79-14, Seismic Analysis for As-Built Piping Sys. Chart Outlining Nonconformance & Insp Results Encl

ML19209A698
Person / Time
Site:	Calvert Cliffs
Issue date:	09/04/1979
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7910050234
Download: ML19209A698 (4)

Text

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[h BALTI M O RE GAS AN D E LECTRIC CO M PANY GAS AN D ELECTRIC BUILDING B ALTl M O R E, M A RYLAN D 212 03 Antsun E. LUN DVALL,JR.

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• September 4, 1979 Mr. Boyce H. Grier, Director Region I, Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19h06 Subjec;: Calvert C~iffs Nuclear Power Plant Units Nos.1 & 2, Docket Nos. 50-317 & 50-318 IE Bulletin No. 79-14 Seismic Analyses for As-Built Pipinst Systems

Dear Mr. Grier:

This letter constitutes the 60 day report required by IE Bulletin 79-14.

We have completed the inspection required by item 2 of the Bulletin for all accessible systems (both redundant and non-redundant) of both Unit 1 and 2. Results of the inspection on each individual piping " stress problem" were categorized as follows:

Group 1 - No non-conformance, or minor non-conformance(s) that clearly do not affect system operability.

Group 2 - Non-conformance elements are judged to be significant, but a review of the original calculation indicates that the impact on the system operability or functionality is minor. Exa=ples of this group are non-conformance of pipe support locations , pipe segment length, etc. ,

on a lov stressed piping system. Group 2 systems can be operated, but analyses must be updated and/or minor mo#.ifications completed.

Group 3 - Non-conformances are judged to be possibly significant and the review of the original calculation indicates that there may be i= pacts to the operability or function-ality of the system. Examples are missing seismic supports at a highly stressed location, etc.

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Mr. B. H. Grier Page 2 September h, 1979 Group k - Discrepancies previously identified, resulting from a re-definition of the boundtries between seismic and non-seismic systems. The re-definition added additional conservatism to the original as-built design criteria as described in the FSAR, and several additional pipe supports were designed, but not yet installed Attachment 1 su=marizes results to date; attachmeat 2 itemizes non-confornances found, action planned, and estims+ad schedule for completing action. Our schedule for the remainder of the inspection program is as explained in our letter of July 31, 1979 Very truly'vours, ..

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paw , WOY z cc: J. A. Biddison, Esquire G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr. - NRC Mr. J. W. Brothers - Bechtel Office of Inspection & Enforcement U. S. Nuclear Reguhtory Cc. mission Division of Reactor Inspection Washington, D. C. 20555

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ATTACHMENT 1 IE BULLETIN 79-14 INSPECTION RESULTS THROUGH 8/31/79 Unit 1 Unit 2 Total Problems Complete 80 87 Partial Problems (Accessible Area) Complete 28 27 Inaccessible Problems 94 63 Results Group 1 70 86 Group 2 5 1 Group 3 0 0 Group h 5 0 1106 003

Attachment 2 Description Of Non-Conformances .

c Action Estimated Problem Isometric Required Comple'tio System Non-Conforman e Unit Group No. No.

Minor deviation in Update 9/28/79 SKM 608 Sh 11 Shutdown Heat Exchanger Analysis C7s 1 2 9 geometry (dimensions).

SKM 608 Sh 12 Piping CZ3 SmM 608 Sh 18 Minor deviation in CED support location.

Valves heavier than Update hff9/28/79 SKM 620 Sh 1 Component Cooling Piping 1 2 kl analy '. Analysis ,__

SKM 620 Sh 2 Condensate From Storage Supports not in agree- Update _.9/28/79 1 2 81A SEM 621 Sh 2 ment with analysis. Analysis Tank Valve added to system, Update 9/28/79 SKM 783 Component Cooling Water 1 2 169 not incorporated in Analysis SKM 786 analysis.

SKM 822 Support missing. Install 9/15/79 SKM 827 Salt Water to ECCS Pump 1 2 207 Support SKM 816 Hoom Cooler No. 12 Valve Weights. Update 9/28/79 2-41 SMM 945 Sh 1 Component Cooling Piping Analysis 2 2 SKM 945 Sh 2 Supports missing. Install 9/15/79 Diesel Staruing Air 1 h 382- SKM 1095 Supports Supports missing. Install 9/15/79 Diesel Starting Air 1 h 381 SKM 1094 Supports Supports missing. Install 9/15/79 SNM 1088 Diesel Starting Air 1 h 379 Supports Supports missing. Install 9/15/79 Diesel Starting Air 1 h 380 SKM 1089 Supports Demineralized Water to Supports missing.

1 h 378 SKM 1086 Install 9/15/79 Service Water Head Tanks- Supports Make Up e