ML20197H998
| ML20197H998 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 12/19/1997 |
| From: | Hosmer J COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9801020050 | |
| Download: ML20197H998 (2) | |
Text
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Downco Grove. it 60515-5701 December 19,1997 U.S. Nuclear Regulatory Commission Washington, DC 20555 0001 Attention: Document Control Desk
Subject:
Comed Plan to Resolve Spurioes Safety Iryection at Power Byron Stations Unit (s) 1 and 2 Facility Operating Licenses NPF-37 and NPF-66 NRC Docket Nos. 50-454 and 50-455 Braidwood Station Unit (s) 1 and 2 Facility Operating Licenses NPF-72 and NPF-77 NRC Docket Nos. 50-456 nad 50-452
Reference:
J. Hosmer (Comed) to Document Control Desk (NRC),
" Supplement to Technical Specification Amendment Pertaining to Primary Containment and Reactor Coolant System Volume," dated December 9,1997.
The reference letter contains Comed's supplement to the Technical Specification (TS)
Amendment request for Byron and Braidwood stations to implement a revised containment peak pressure (P,) analysis. In the referenced letter, Comed committed to provide the NRC notification of Comed's plan to resolve an identified issue concerning the Spurious Safety Injection at Power accident. Specifically, during the review process of preparing the P, TS amendment, Comed evaluated the accident analysis related to the reactor coolant volume change. For the Spurious Safety Injection accident, a potential conflict between the Byron /Braidwood (B/B) UFSAR assuinptions and the Emergency Operating Procedures (EOPs) was discovered. Specifically, the EOPs do not provide explicit direction for the manual action of the pressurizer Power Operated Relief Valves (PORVs) as stated in the B/B UFSAR, section 15.5.1.
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9001020050 971219 PDR ADOCK 05000454 P
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U.S. Nuclear Regulatory Commission
-2 December 19,1997 Comed has performed operability evaluations at both Byron and Braidwood Stations which provide reasonable assurance of operability. As a corrective action, Comed has decided to pursue revising the B/B UFSAR to credit the automatic action of the pressurizer POltVs to mitigate the Spurious Safety Injection transient maximum overfill case ns described in UFSAR section 15.5.1. This revision to the B/B UFSAR will also require revision of the current B/B Technical Specification (TS) Bases 3/4.4.4, Relief Valves. Comed anticipates that the safety analysis and evaluations u support the UFSAR and TS bases changes will be completed by April 30,1998.
Please direct any questions you may have concerning this information to this office.
Sincerely,
^
J., B / W,
John B.1-losmer Engineering Vice President cc:
Regional Administrator - Rill Byron /Braidwood Project Manager - NRR Senior Resident Inspector Byron Senior Resident Inspector - Braidwood Office of Nuclear Safety - IDNS
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