ML20127D121
| ML20127D121 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 06/17/1985 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Reed C COMMONWEALTH EDISON CO. |
| References | |
| CAL-RIII-85-07, CAL-RIII-85-7, NUDOCS 8506240131 | |
| Download: ML20127D121 (2) | |
Text
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CAL-RIII-85-07 O m (d JUN 171985 CONFIRMATORY ACTION LETTER Docket No. 50-373 Docket No. 50-374 Comonwealth Edison Company ATTN: Mr. Cordell Reed Vice President Post Office Box 767 Chicago, IL 60690 Gentlemen:
This letter confirms the conversation on June 14, 1985, between Mr. D. Galle of your staff and Mr. C. E. Norelius of my staff related to the discovery of improperly installed instrumentation and the resultant loss of automatic actuation of Emergency Core Cooling Systems capability from June 5 through June 10, 1985, while the Unit was in cold shutdown. With regard to the matters discussed, we understand you have taken or will complete the following actions prior to startup of La Salle, Unit 2:
1.
Review,for all safety-related electrical and mechanical modifications, made or planned during this outage, all packages to ensure that modifica-tions properly implement the design concept and that drawings to be used by operational personnel accurately reflect the modification.
2.
Physically walkdown all safety-related systems modified during the outage to verify that the actual installation matches the planned modification.
This walkdown is limited to physically accessible items.
3.
Review tests performed on all safety-related systems on which modifications or maintenance was performed during this outage to assure that testing adequately demonstrated operability in light of the work actually per-formed. Perform additional tests as required.
4.
Test all level switches, modified during the outage by:
a.
Up to instrument block---vary actual level and verify proper response to level change.
b.
From instrument block to instrument---physically walkdown to verify proper alignment for operation.
5.
Review all safety-related mechanical and electrical operational checklists to verify proper alignment of plant systems. This effort will provide an extra level of assurance on both systems that were modified and those that were not subject to modification during the outage.
6.
Provide test results, your conclusions, and a summary of corrective actions l
to the NRC resident office.
l CONFIRMATORY ACTION LETTER 8506240131 850617
- o PDR ADOCK 05000373
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CONFIRMATORY ACTION LETTER Commonwealth Edison Company 2
JUN 171985 Additionally, we understand the following action will be taken:
a.
Prior to initiation of any further safety-related modifications by a contractor, review and revise, as required, the current Quality Control guidance for safety-related modifications in the areas of drawing updates, QC hold points, and operability tests, and assure that the contractor involved has complied with these changes.
b.
By August 1, 1985, review all contractor Quality Control programs to assure that program modifications in the areas of updating field drawings, QC coverage during installation, and conduct of adequate construction tests are instituted by all contractors in light of lessons learned during this event.
We understand that you are taking additional long range steps including training, labeling of instrument lines, procedure reviews, and evaluation of involvement of responsible site engineers in modifications to implement lessons learned in this event. We will follow your actions in these areas during subsequent inspections.
Please let us know immediately if your understanding differs from that set forth above.
Sincerely, Original signed by Jams G. Keppler James G. Keppler Regional Administrator cc:
D. L. Farrar, Director of Nuclear Licensing G. J. Diederich, Plant Manager DMB/ Document Control Desk (RIDS)
Resident Inspector, RIII Phyllis Dunton, Attorney General's Office, Environmental Control Division RII RII RIII RIII
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I Kepp}6 ison/cs Noreli s vis er 6/17/85 7
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CONFIRMATORY ACTION LETTER w