ML20128D496

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Forwards Amend to Recovery Plan Changing Section on Setting Alarm & Failsafe Setpoints for CAM
ML20128D496
Person / Time
Site: Reed College
Issue date: 03/31/1992
From: Terdal P
REED, J.G.
To: Qualls P
NRC
Shared Package
ML20126M891 List:
References
FOIA-92-35 NUDOCS 9212070292
Download: ML20128D496 (1)


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-y Tortland, Oregon oms em 7E8D.C0LLEOE atAC1 M UCfLtTF March 31,1992 To: Reactorinsmotor NRC' Phil MarvinQualls, Men donos, or Sen Project danager, NRC Fromi PaulTordal, Assoolate Director, Reed Reactor Foollity Me: Amendments to Rooovery Plan Attached is a completed copy of the Amendments to the Recovery Plan. Aside from correctlng some typographical errors, the only major change is in the '

section on setting the alarm and fallsafe setpoints for the CAM and APM.

As you had pointed out, the flow rate of 6.5 CFM was not really 7.8x10e m l/ min, but 1.8x10sml/ min, or 3000 ml/s. This, of course, radoally changes the alarm and f alisafe setpoints, such that they are now even lower than befort. Those ,

i equations were, of course, written very conservatively.- Although the CAM and APM sample in the Reactor Faolitty, or in the stack were materials leave the >

reactor, the action levels in the Emergency Plan really refer to the Site -

Boundary,250 feet away. This means that we could take disperelon into the actionlevels are account based on theifassumptfon we chose to amount that the as weof did with the GSM. Also' material released is 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> With the GSM,we assumed that after an hour of release the foollity would be shut down, limiting the amount of additional material released.

We propose to alleviate this problem by assuming that any release will be a 1

> hour release averaged over 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, as we have done with the GSM. Since the reactor will be shutdown 11 the Fallsafe condition la released, this is not unreasonable. This is still quite conservative, since it neglects disperelon.

If you have any additional comments or questions, please contact either Michael Pollock or myself at (503)777 7222.

Sincerely, f

Paul Tordal Associate D! rector, Reed Reactor Facility

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