ML20206K748

Discusses Predicted High Stack Release Rates During Shutdown Period Beginning on 750111 Due to New Advanced Offgas Sys Shakedown Problems.Recommends That Div of Licensing Be Advised

ML20206K748
Person / Time
Site:	Pilgrim, 05000000
Issue date:	01/14/1975
From:	Brunner E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Thornburg H US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20204E974	List: 05000000/LER-1975-004, :on 750112 & 13,analysis of Reactor Bldg Vent Process Radiation Monitoring Sys Revealed Release of Radioactive Effluents Exceeding Tech Spec Limit by 55%. Caused by High Iodine Activity in Reactor Coolant 05000000/LER-1975-005, :on 750127,analysis of Reactor Bldg Vent & Main Stack Charcoal & Particulate Filters Revealed Release Rates of Halogens & Particulates w/half-lives Greater than 8 Days, Exceeding Tech Spec Limits by 24% 05000000/LER-1975-014, :on 750519,analysis of Reactor Bldg Vent & Main Stack Charcoal & Particulate Filters for Wk of 750513-20 Revealed Release Rates of Halogens & Particulates Exceeding Tech Spec Limits by 23% BECO-82-194, Responds to Confirmatory Action Ltr 82-19 Re Identification of Spent Resin on Roof Tops & Pavement within Protected Area on 820611.Condensate Demineralizer Sys Identified as Resin Source & Secured.Related Documentation Encl IR 05000293/1975002 ML20204E969 ML20204J237 ML20206F330 ML20206K250 ML20206K259 ML20206K286 ML20206K305 ML20206K341 ML20206K353 ML20206K363 ML20206K365 ML20206K385 ML20206K423 ML20206K439 ML20206K444 ML20206K449 ML20206K480 ML20206K485 ML20206K494 ML20206K504 ML20206K510 ML20206K520 ML20206K526 ML20206K530 ML20206K548 ML20206K555 ML20206K564 ML20206K579 ML20206K598 ML20206K616 ML20206K635 ML20206K639 ML20206K659 ML20206K688 ML20206K693 ML20206K698 ML20206K704 ML20206K709 ML20206K731 ML20206K743 ML20206K748 ML20206K754
References
FOIA-86-58 NUDOCS 8606300182
Download: ML20206K748 (1)

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JAN 141975 H. D. Thornburg, Chief, Field Support and Enforcement Branch Directorate of Regulatory Operations, llQ PREDICTED llIGH STACK RELEASE RATES AT PILGRIM Pilgrim 1 was shut down on January 11 because of a recirculation pump seal problen. The shutdown is scheduled to last about one week. During the time of the shutdown, activity out of the Reactor Building vent stack increased, per the licensee, to above the TS limits. Pilgrim has leaky fuel problets, however, the A0G (Advanced Offgas System) has maintained stack releases to 1000 to 1300 pCi/sec. The new A0G, has experienced shakedown type problems in its initial operation and because of the,

high activity in the retention building housing the A0G corrective l

maintenance has been a problem. The licensee plans to start up and operate the reactor without the A0G and perform the necessary mainte-nance repairs and/or modifications. The Technical Specifications per- -

mit this.

(Note: Air ejector rates have been as high as 500,000 pCi/sec at 90% power.) The repair and/or modification work may re-quire six or nore weeks to complete.

Because of the political tenderness of the as low as practicable matter at Pilgrim, we expect that any operation without the A00 will result 1

in attention by intervenors and the news media.

It is recommended that f

DL be advised of this matter.

Should you have any concerns, please advise us.

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Brunner, Chief Rea tor Operations Branch cc: Carl Kuhlman Ferd Dreher j

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