ULNRC-05150, Attachment 3: Markup of Technical Specification Pages
| ML063170328 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 11/07/2006 |
| From: | AmerenUE |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2006-0230, ULNRC-05150 | |
| Download: ML063170328 (9) | |
Text
ULNRC-1S Iso ATTACHMENT 3 MARKUP OF TECHNICAL SPECIFICATION PAGES in accordance with the Freedom of Information Act, exemptions -
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February 2005 Chronology of Callaway MSIV Operability Issues January 23, 2006 The licensee completed a new MSL Break accident Analysis Case (Case 17). Case 17 considered the plant configuration with one MSIV actuator removed from service. The current licensee bases (CLB), including Technical Specifications (TS), and the accident analysis assumed, 141 million BTUs/hr containment cooler duty. Case 17 assumed 155 million BTUs/hr cooler duty. The 155 million BTUs/hr duty was based. on additional margin provided by clean, unblocked heat exchanger coils. The new Case 17 concluded the resulting peak containment temperature and pressure was bonded by CLB Cases 6 and 12 (the limiting Cases).
Licensee prepared a 50.59 safety evaluation to add the new MSL Break accident Analysis Case (Case 17) to the CLB. The licensee.con.cluded that prior NRC approval was required.
March 2005 itJ The licensee submitted a license amendment request to establish a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> out of service time for an inoperable'MSIV actuator.
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