ML20032C360

Approves Proposed Change in Auxiliary Bldg Air Cleanup Sys Surveillance Flow Rates Until 820201.Copy of Tech Spec Change 8 Encl

ML20032C360
Person / Time
Site:	Crane
Issue date:	10/15/1981
From:	Barrett L Office of Nuclear Reactor Regulation
To:	J. J. Barton METROPOLITAN EDISON CO.
References
NRC-TMI-81-058, NRC-TMI-81-58, NUDOCS 8111090717
Download: ML20032C360 (3)

Text

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OCT 151981 TERA TMI Site r/f NRC TMI 81-058 TMI HQ r/f Docket No. 50-320 CD BSn Mr. J. J. Barton

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g e Acting Director, THI-0 g

LChandler Metropolitan Edison Company gg 7 _

MDuncan gg@ gM,poS$ -

ACRS U C P.O. Box 480 Middletown, PA 17057 tr J/,

DBrinkman O

0 Lynch

Dear Mr. Barton:

My RWeller M \\/

HRDe The NRC staff has reviewed your Recove fations Plan Change Stonequest No. 9, dated October 15,1981, (LL2810246). The change request proposed a temporary change in the Auxiliary Building Air Cleanup System (ABACS) surveillance flowrates from a minimum of 65,000 CFM to 63,000 CFM + 10%

until February 1,1982. You stated that this change allows greater

' flexibility and will not adversely affect the margin of safety in the bases of the Recovery Operations Plan and that this flowrate will be sufficient to maintain 0.125 inches of water negative pressure in the auxiliary building.

This tmiporary change was requested until a permanent change based on a detailed review of system design can be completed.

After perfoming a general review of the system design and perfomance the staff has confirmed that an ABACS flowrate of 63,000 CFM + '.110% will be capable of maintaining 0.125 inches of water negative pres 71re in the auxiliary building and that it will not adversely affect the margin of safety in the bases of the Recovery Operations Plan. We further note that the proposed flowrates are consistent with a nominal design capacity of 1000 CFM per filter unit. Therefore we have approved the proposed change in Surveillance Requirement 4.9.12.C.2 to allow a flow of 63,000 CRi110% until February 1.1982.

A copy of change No. 8 to the Recovery Operations Plan is attached.

Originca Signed by Iseco l]. Ba3T8tk L. H. Barrett Deputy Program Director THI Pronram Office

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t SURVE:' LANCE REOUli.EF.' :II J

L10VIDRAD1'OAdTIVEWA5TI'Si0kA2E 4.9 FUEL HANDLING BUILCir3/ AUX 1LI ARY EU!tDIN3 A)R CLEANUP SYSTEMS The fuel handling building air citanup system and the auxiliary 4.9.12 building air cleanup system shall be cemonstrated OPERABLE:

At least once per 31 days by initiating, f rom the control room, flow through tne HEPA filters anc charcoal adsorbers and verifying that a.

each filter train operates for at least 15 minutes, 15 months or (1) af ter any structural Initially and at least once per b.

caintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any ventilation 2one communjcatingwiththesystemcy:

Verifying a flow rate of 22,000 cfm + 10% for each fuel handling 1.

building exhaust filter train when tested in accordance with ANSI N510-1975.

Verifying a flow rate of 36,000 cfm + 10% for each auxiliary 2.~

building exhaust filter train when tested in accordance with

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ANSI N510-1975.

At least once per 18 months by:

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Verifying an exhaust flow raie of at least 35,000 cfm for the 1.

fuel handling building air cieanup system with two fuel handling building supply f ans and two fuel handling building exhaust fans in operation.

Verifying an exhaust flow rate of at least 65,000*cfm for the auxiliary building air cleanup system with two auxiliary building 2.

supply fans and two auxiliary building exhaust fins in. operation.

y Verif,"ing that the pressure drop across the combined HEPA l

3.

filters and charcoal adsorber banks of each fuel handling building filter train is less than 6 inches Water Gauge while I

it operates at a flow rate of 23,000 cfm + 10%.

Verifying t at the pressure drop across the combined HEPA h

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4.

filters and charcoal adsorber banks of each auxiliary building i

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filter train is less than 6 inches Water Gauge while it operates l

at a flow rate of 36,000 cfc + 10%.

1

• May be 63,000 CFM i 107. until February 1, 1982.

r Change No. g

~THR5E Mit'E 15 LAND - UNIT 2 4.9-1 i

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