ML20028C454

Comments on Div of Operating Reactors Proposed Action on Prevention of Offgas Explosions Per IE Bulletin 78-03,in Response to 790130 Request.Concern Re Location of Instrument Readouts at Facility Expressed

ML20028C454
Person / Time
Site:	05000000, Cooper
Issue date:	02/07/1979
From:	Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:	Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20027A594	List: 05000000/LER-1977-040, Forwards LER 77-040/01T 05000000/LER-1977-040-01, /01T:on 771213,two Hydrogen Detonations Occurred in Offgas Sys & Stack Base,Resulting in Momentary Radioactive Release & Injury to One Employee.Initial Detonation Caused by Arc Strike on Instrument Tubing 05000000/LER-1977-043, Forwards LER 77-043/03L-0.Detailed Event Analysis Encl 05000000/LER-1977-043-03, /03L-0:on 771219,stack Gas Monitor Sample Probes & Mounting Beam Discovered Damaged.Caused by 771213 Stack Base Hydrogen Detonation.Monitor Probes & Support Beam Replaced & Sys Operation Restored on 771223 IR 05000245/1977033 ML20027A593 ML20027A595 ML20027A612 ML20028C393 ML20028C398 ML20028C399 ML20028C403 ML20028C405 ML20028C407 ML20028C408 ML20028C410 ML20028C411 ML20028C412 ML20028C413 ML20028C414 ML20028C415 ML20028C419 ML20028C420 ML20028C422 ML20028C423 ML20028C424 ML20028C425 ML20028C426 ML20028C427 ML20028C428 ML20028C430 ML20028C431 ML20028C432 ML20028C433 ML20028C434 ML20028C435 ML20028C436 ML20028C437 ML20028C440 ML20028C441 ML20028C442 ML20028C443 ML20028C446 ML20028C448 ML20028C449 ML20028C450 ML20028C451 ML20028C452 ML20028C453 ML20028C454 ... further results
References
FOIA-82-545 IEB-78-03, IEB-78-3, NUDOCS 8301100204
Download: ML20028C454 (1)

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February 7, 1979 w -z17 MEMORANDUM FOR:

E. L. Jordan A/D for Technical Programs, IE.

FROM:

G. L. Madsen, Chief, RO&NS Branch, RIV

SUBJECT:

INFORMATION REGARDING PROPOSED 00R ACTION ON PREVENTION OF 0FFGAS EXPLOSIONS

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In response to your request of January 30, 1979, same subject, the follow-ing comments are provided for your consideration.

Region IV has completed the followup inspections for Bulletin 78-03. We have only one concern with the offgas system instrumentation at Cooper Station and that relates to the location of the instrument readouts. The offgas system is well instrumented for. flows, terrperatures, pressures, and gas concentrations; however, the readouts are located in the Augmented Offgas Control Room (A0CR) in the radwaste building. An annunciator alarm from one of these parameters would give a master alarm in the main control room but as the A0CR is not continuously manned, there would be a reaction time delay.

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G. L. Madsen, Chief, Reactor Operations and Nuclear Support Branch (7001100204 821207 PDR FOIA HIATT02-545 PDR l

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