ML20066G060
| ML20066G060 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 01/18/1991 |
| From: | Morgan W COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20066G063 | List: |
| References | |
| ZNLD654-16, NUDOCS 9101240349 | |
| Download: ML20066G060 (2) | |
Text
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Commtnwealth Edistn :
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1400 Opus Place Downsrs Grove, Illinois 60515 January 18,1991-U.S. Puclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
Subject:
'LaSalle County Station Units 1 and 2L Supplement to the Proposed Amendment to L the Technical Specification for Facility 03erating License NPF-11 and NPF-18.
N1G_RockeWot.50-373 and 50 374
References:
1 (a)' W.E. Morgan letter to T.E. Murley dht9d d
July 26,1989, W.E. Morgan letter to U.S. NRC dated
- (b) July 9,1990.'
Dear Sir:
References (a) and (b) transmitted Commonwealth Edison's proposed Technical Specification Amendment to allow continued plant operation for a period of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with the Maln Steam Tunnel High Ambient Temperature and High
-Ventilation Systems Differential Temperature Trips Bypassed.
Per a January 16,1991 teleconference with members of your staff, Commonwealth Edison's LaSalle Station was requested to supplement its original proposed amendment to address NRC staff concerns, regarding the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> allowed -
outage time.-
1
- M following attachment provides that response along with the revised.
_ proposed Technical Specification page changes.
'~
.Please direct any questions you may.have regarding th!s matter to this Very truly yours, j
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W. Mor an-L Nuclear Licensing Administrator Attachment-cc:
A.B Davis - Region lli J. Hickman - Project Manager, NRR Senior Resident inspector - LSCS WM:Imw 9101240349 91otte n40Uy< p654/16
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BACKGBQUERID1SDilS_SION On January 16,1991 per telephone a discussion was held with the NRC concerning the LaSalle Station technical specification amendment request-(Reference (a) which proposed to introduce a 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> allowed outage time (AOT primary contain) ment isolation system (PCIS) inputs from the main steam tunnel 1
(MST) ambient temperature and ventilation system differential temperatur( trips, The 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AOT would allow both channels of each MST temperature trip cystem to be ) laced in an inoperable status for required reactor building ventilation symem ma ntenanco, filter changes, damper cycling and surveillance testing without placing the trip system in the tripped condition The 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AOT was based on the period of time required to complete the secondary containment leak rate test.
The NRC expressed a concern that the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AOT might be longer than.
needed for other required activities such as corrective maintenance, filter chan es -
and damper cycling. The station agreed with the'NRC's aosition and is revisin the i
areviously submitted amendment request (Reference a)10 restrict the AOT to 1ours for activities other than the secondary containment leak rate test (refer.to -
Attachment B),
it is requested that the technical specifications be amended as indicated in Attachment B. The marked up technical specification pages in this submittal are intended to replace those in the original submittal in their entirety -
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