ML20010F857
| ML20010F857 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/04/1981 |
| From: | Delgeorge L COMMONWEALTH EDISON CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20010F858 | List: |
| References | |
| RTR-NUREG-0588, RTR-NUREG-588 IEB-79-01B, IEB-79-1B, NUDOCS 8109110465 | |
| Download: ML20010F857 (3) | |
Text
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2 Commonwealth Edison
) one First NItiorcl Ptiza. Chicago, Illinois 5 O Address Riply to: Post Offica Box 767 Chicago, Illinois 60690
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Mr. A. Schwencer, Chief S
Licensing Branch 2
' k9pD Division of Licensing r
U.S. Nuclear Regulatory Commission
._J Washington, DC 20555
Subject:
LaSalle County Station Units 1 and 2 Environmental Qualification of Safety-Related Equipment in Harsh Environments -
Revised Report NRC Docket Nos. 50-373/374 Reference (1):
L. O. DelGeorge letter to A.
Schwencer dated June 4, 1981
Dear Mr. Schwencer:
Enclosed for your review is the subject revised report which documents the status of the environmental qualification of
(
safety-related equipment in a harsh environment for LaSalle County t
Units 1 and 2.
These materials supercede those previously docketed in Reference (1) and those submitted informally in August, 1981.
The enclosed report includes the following documents:
1.
Summary Response to NRC Trip Report (June 29, 1981) 2.
Appendix M (September 1, 1981) 3.
Requalification Action Plan (Revision 1, Sept.
1, 1981) 4.
Revision 0-8, August 31, 1981 1.
Summary Response to NRC Trip Report (June 29, 1981)
Although no response to the subject trip report was requested, the' summary provided discuses the status of issue's identified by the NRC Staff at the audit conducted at LaSalle County in June, 1981.
t[g 2.
Appendix M to the FSAR 3
This document acknowledges the results of the Evali.'.ation Phase, [O which is completed, intheEQSummaries({M.5.1andM.5.2).
Equipment folders (not enclosed) have been assembled to include:
a)
The enclosed summaries.
b)
Th^ NUREG 0588 check lists to which the evaluation was made.
$[k 0
C
. f An independent EQ appraisal by Wyle Laboratories.
c)
The Commonwealth Edison statement of the qualification d) status.
File copies of applicable test reports and analyses are also assembled for audit purposes.
water spray (M.S.1 This document addresses submergence (M.A.4), and ECCS pump motors display instrumentation (M.3.3) Newly defined HARSH enviro and M.S.2),
Errors and (M.S.1 and M.5.2).
include the revised radiation model (post TMI).
inconsistencies in the definition of accident profiles andin the abnormal environmental conditions, which were identifiedThe content of Sectio NRC field audit, have been corrected.
to M.S.1, and M.S.2 has been changed per staff instructions
)
delete mechanical and pressure boundary integrity (passive Section M.7 which records the status us of September 1, 1981, is updated to indicate Edison's decision to commit all items.
except a few (i.e. 5) items of unqualififed equipment to test,results will become known prior to the equipment whose test 1981 closure date definition of LaSalle's last October 15, scheduled test basket.
to The status indicates 23% of LaSalle Class IE equipment items d 5%
committed to EQ testing, an 0588, 72%
588 awaiting test documentation to show qualification to NUR be qualified to NUREG standards.
is underway at the station.
equipment (4 line items)
You should be aware that qualification test deficiencie i
d i
to are currently being evaluated for potential applicabil tyAppropriate cha LaSalle County Station Unit 1.if determined to be required.
to this report Requalification Action Plan 3.
includes an explicit definition of This revised action plan nowwhat is intended by Qualification Testin i
2.3 to assure the NRC Staff thatSchedules for test planning and execution are now included for the first six baskets ofRev planned test sequences.
equipment.
additions were made to include NSSS equipment. test baske Revisions may contingency items or re-test equipment as needed.
t be made to the requalification action plan during the l
test failures, replacement decisions involving upgradedrelo equipment,
. reduce HARSH environment exposure, etc.
The qualification process is represented via this action plan, and it has been updated to September 1981.
It is not represented to be a rigid prescription to be followed without considering status changeson equipment items as industry tests progress concurrently with LaSalle's EQ program.
This potential for future modification of the LaSalle County test plan based on the availability of acceptable test data was reviewed with you and your Staff in August, 1981, and we understand, is acceptable to you.
4.
Assessment to Jurtify Interim Operation This appraisal of the safety of the LaSalle plant, during the first two fuel cycles while formal EQ testing is in progress, includes a discussion on single-failure criteria (Section now 4.6) and a discussion, with examples for roadmapping purposes, of concerns expressed by the staff during the field audit with respect to consequences of equipment failures on other safety functions and operator references (Section 6).
Commonwealth Edison would be pleased to bring a team of experts to your offices to review this study with the Staff if required.
The enclosed documents are intended to respond to all questions previously raised by the Staff.
The materials presented in Appendix M shall be docketed in a future amendment to the FSAR.
In the event you have any questions relative to the enclosed materials, and in particular the Assessment to justify Interim Operation, please contact this office.
Three (3) copies of the report are provided for your use.
Very truly yours, L. O. DelGeorge Director of Nuclear Licensing cc:
NRC Resident Inspector - LSCS 2498N
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