ML19224C665

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Responds to IE Bulletin 77-07.Safety-related Penetrations for Unit 1 Do Not Use Epoxy Seal described.Safety-related Penetrations for Unit 2 Are Mfg by Amphenol Sams Div of Bunker Ramo Corp & Does Use Epoxy Seal Described
ML19224C665
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 05/23/1979
From: Delgeorge L
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 7907060031
Download: ML19224C665 (3)


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Commonwealth Edison dy One first Nanonal Plaza. Chicago. tilinois Address Reply to: Post Office Box 767

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Chicago, Ilhnois 60690 g

May 23, 1979 Mr. James G. Keppler, Director Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Supplemental Response to IE Bulletin 77-07 LaSalle County Station Units 1 and 2 NRC Dochet Nos. 50-373 and 50-374 Reference (a): D. E. O'Brien letter to J. G. Keppler dated January 20, 1978

Dear Mr. Keppler:

The Commonwealth Edison response to IE Bulletin 77 ^7 submitted to your office in Reference (a), indicated that a response for LaSalle County Station would be made after the penetration tyre for LaSalle County Units 1 and 2 had been fixed.

Attached is the response for LaSalle County Station.

Very truly yours, g L. O Del orge Nuclaar Licensing Administrator attachment cc: Office of Inspection and Enforcement Division of Reactor Construction Inspection on?

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2 41979 790706003/

Commonwealth Edison NRCDocket1}os. 50-373/374 ATTACHMENT 3._

LASALLE COUNTY STATION RESPONSE TO IE BULLETIN 77-07 NOTE: The following responses are keyed to the questions in IE Bulletin 77-07. Where the LaSalle County response is identical to that submitted in the D. E. O'Brien letter to J. G. Keppler dated January 20, 1978, attention is directed to that letter as Reference (a).

1.0 All the safety-related penetrations ordered for LaSalle County Unit 1 are manufactured by Conax Corporation, and the design is a pressure fitting which does not use the epoxy seal

described in the bulletin. Therefore, the Unit 1 safety-related penetrations will not be addressed further in this report. The qualification requirements for these penetra-tions can be determined by reference to FSAR Table 3.10-1.

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All the safety-related penetrations ordered f'or LaSalle County Unit 2 are manufactured by Amphenol Sams Division of j Bunker Ramo Corporation. This design does employ the epoxy

> seal with a pressure barrier as described in the bulletin.

In addition, there are several one (1) inch penetrations for lighting and communication used on Units 1 and 2 which are manufactured by Amphenol, These penetrations do rot carry safety-related cable.

1.1 See Item 1.0 above, i

, 1.2 See Reference (a).

2.0 The Amphenol penetration assemblies for LaSalle County Station have been manufactured and shipped to the site, except for penetrations 2B33-5301 and 2B33-5302. Several of the penetrations were received with 0 psi nitrogen pressure.

Since arrival at the site, pressore has been maintained on all penetrations. This pressure will also be maintained during and after installation to manufacturer's instructions.

Before installation, any penetration assembly that was received with 0 psi nitrogen pressure will be inspected by ' k - facturer to insure no moisture is present in tb .siy. The safety-related penetrations will be in alled with an automatic pressure system.

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Commonwealth Edison NRC Docket Nos. 50-373/374 The one (1) inch non safety-related lighting and communication penetrations will not be installed with an automatic pressure system because they have maintained their design pressure over very long periods. Normal periodic surveillance of penetration pressure will insure that design requirements are satisfied.

3.0 See Reference (a) and Item 2.0 above.

3.1 The functional requirements and the reference documents listed in the penetration procurement specification (S&L Specification J-2552) identify the design reviews, analyses and tests required to insure that the penetrations will perform their design function under LOCA conditions.

The FSAR Sections 3.10 and 3.11 contains a detailed discussion of the qualification requirements.

3.2 See Reference (a).

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