ML20111B046
| ML20111B046 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/09/1996 |
| From: | Querio R COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9605140154 | |
| Download: ML20111B046 (2) | |
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ComnSonwealth latiwn Company
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IMalle Generating Mation 2 Nil N3rth list Road
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Al.srseilles, IL 613 41-9757 Tel 8153570761 May 9,1996 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555
Subject:
LaSalle County Nuclear Power Station Units 1 and 2 Revision to February 5,1996, Comed's response to NRC Request for Additional Information NRC Docket Nos. 50-373 and 50-374
Reference:
1.
R. E. Querio letter to USNRC, dated February 5,1996, transmitting Comed's response to NRC Request for Additional Information The purpose of this letter is to provide a revision to the Reference 1 Comed RAI Response. The following information supersedes the Reference 1 Comed response to NRC Question 2.C.1 in its entirety:
NRC Question 2.C.1:
2.C.
Address the degree of compliance with augmented examinations that have been established by the NRC when added assurance of structural reliability is deemed necessary.
Examples of documents that address augmented examinations are:
1.
Branch Technical Position MEB 3-1, High Energy Fluid Systems, Protection Against Postulated Piping Failures in Fluid Systems Outside Containment.
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Revised Comed Response to NRC Ouestion 2.C.1:
The augmented examinations established by the NRC through Branch Technical Position MEB 3-1, High Energy Fluid Systems, Protection Against Postulated Piping Failures in Fluid Systems Outside Containment, Revision 0, dated 11/24/75, do not explicitly require volumetric examination of all high energy piping welds located in the containment area outside containment, unless the high energy piping is located inside a guard pipe. A working draft of MEB 3-1, dated 8/5/77 (refer to FSAR, Appendix C, Article C.2) does clarify that the augmented examination requirements (100 percent volumetric examination) apply for high energy fluid piping welds, located inside and outside the containment areas, regardless of whether the piping is inside a guard pipe or not. These augmented examination requirements were included in LaSalle's ISI Program for the first ten year interval and remain unchanged in LaSalle's ISI Program for the second ten year interval.
All high energy fluid piping wolds, located inside and outside the containment areas, receive a 100 percent ultrasonic inspection as required.
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If there are any questions or comments concerning this letter, please refer them to JoEllen Burns at (815) 357-6761, extension 2383.
Respectfully, j
R. E. Querio Site Vice President LaSalle County Station Enclosure cc:
H. J. Miller, NRC Region lli Administrator P. G. Brochman, NRC Senior Resident inspector - LaSalle D. M. Skay, Project Manager - NRR - LaSalle F. Niziolek, Office of Nuclear Facility Safety - IDNS Central File l