ML19242A531
| ML19242A531 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 07/12/1979 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-79-08, IEB-79-8, NUDOCS 7908030088 | |
| Download: ML19242A531 (1) | |
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July 12, 1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DCCKET 50-155 - LICENSE DPR BIG ROCK POIN'" PLANT - ADDITICNAL RESPONSE TO IE BUILETIN 79-08:
E'IENTS RELE'! ANT TO E0ILING WATER REACTORS ICENTIFIED DURING TEREE MILE ISLAND INCI"ENT Consumers Power Ccepany letter dated May 4, 1979 forwarded cur response to Questions 1 through 10 of the subject Bulletin. Additional review of cur response has identified a need to clarify one item.
Questic 7 of the subj-et Bulletin requested, in part, a tahulation of systems intendec to transf er potentially radioactive liquids and gases out of primary contain=ent.
The Bulletin further required that each such system, which included an interlock to prevent transfers wnen high radiation is present, be identified.
Our May 4, 1979 letter identified the cont incent rientilation supp.y and exhaust valves as being so interlockad.
Clarification is needed regarding the qualification of this high radiation interlock.
The nign radiatics interlock addressed in our May 4,
1979 letter is intended
- prevent release of radicacti-city wnich sight result f rca an accident during fuel hanal;ng taside containment.
As such, the equipment assoc:ated with these interl2cks are ac~. qualified f:: perf o rman:e in the en.ir:n=en wn:cc wculd be present fall: wing a 1:ss of ::a;2n acc; dent; en. rctaenta. extremes considerei :n the spec;f;catists for this equipnent were a tempera _re of 1203F and a haardi y of 50 percent.
Fa;12:e of a detector wcui: result in valve opening. Accordingly, while this ;ntericck ma. function nitially for certa:n steas releas e e tects, it canrot be relied en Oc maintain a talve clasure signal in a sustained adverse ensircament.
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David P Hoffman bbU
/3C Assistant Nuclear Licensing Administratcr CC Director, Office of Nuclear Reactor Regulati:n Director, Office of Inspecticn and Enforcement oc0779-01392-43 79080aoCg6f
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