ML20129A767

Requests Fr Publication of Notice of Consideration of Issuance of Amend to License DPR-9 & Proposed NSHC Determination & Opportunity for Hearing on 960829 Request to Allow Certain Equipment to Be Removed from Svc

ML20129A767
Person / Time
Site:	Fermi
Issue date:	10/10/1996
From:	Brown S NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	NRC
Shared Package
ML20129A755	List: ML20129A751 ML20129A767
References
TAC-L51458, NUDOCS 9610220236
Download: ML20129A767 (5)

Text

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y s?Y **J4, y .f,t UNITED STATES NUCLEAR REGULATORY COMMISSION  :

f WASHINGTON, D.C. 20666-00 %  !

\...../ October 10, 199.6 4

l MEMORANDUM T0: Biweekly Notice Coordinator j t

FROM: Stewart W. Brown, Project Manager [

Low-Level Waste and Decommissioning

, Project Branch Division of Waste Management -

Office of Nuclear Material Safety '

and Safeguards 1

SUBJECT:

REQUEST FOR PUBLICATION IN BIWEEKLY FR NOTICE - NOTICE OF i

CONSIDERATION OF ISSUANCE OF AMENDMENT TO FACILITY OPERATING i . LICENSE, PROPOSED NO SIGNIFICANT HAZARDS CONSIDERATION

! DETERMINAT'ON, AND OPPORTUNITY FOR A HEARING (TAC NO. i i

L51458)

)

Detroit Edison Comoany. Docket No. 50-16. Enrico Fermi Atomic Power Plant. .

Unit 1. Monroe County. Michiaan j Date of ---# .7t reauest: August 29, 1996 (Reference NRC-96-0111)

Descriotion of amendment reauest: The proposed amendment will: (1) allow j certain equipment and instruments to be removed from service for short periods j of time to allow for maintenance, testing, inspection, modifications, and I

account for equipment failures; (2) reduce the frequency of environmental l liquid effluent monitoring and eliminate one raw water sampling location; (3) j 411minate ties requirement for moisture intrusion monitoring for the reactor i building lower level; and (4) correction of a tys,ographical error.

Basis for orososed no sianificant hazards consideration determination: As rer,dired by 10 CFR 50.91(a), the licensee has provided its analysis of the j'

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i issue of no significant hazards consideration using the standards in 10 CFR 50.92(c). The licensee's analysis is presented below:

(1) The operation of Enrico Fermi Atomic Power Plant. Unit 1. in m al ance d with the proposed amendment will not involve a sionificant increase in the orobability or consecuences of an accident oreviously evaluated.

The proposed changes do not involve a significant increase in the probability or consequences of an accident. Provisions for removing 1

the primary cover gas supply from service for short periods of time will not significantly increase the probability of an accident occurring as long as the probability of a significant water reaction with residual sodium is not significantly increased. This is ensured by prescribing limits on the time that carbon dioxide pressure can be low. The consequences of an accident would not be affected by provisions for removing the primary cover gas supply from service as this equipment does not mitigate accidents or affect the accident sequences. Similarly, the provisions for removing the moisture intrusion and cover gas pressure alarms from service for short period l

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! ef time will not~significantly increase the probability of an accident. The alarms provide a monitoring function to detect degradation in the perfonnance of the cover gas supply and sump systems. Absence of these alarm functions for short periods of time does not increase the probability of such degradation and it does not significantly impact the ability for timely detection of such degradation. The consequences of an accident would not be affected by provisions for removing the moisture intrusion and cover gas pressure alanes from service as this equipment does not mitigate accidents or i

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affect the accident sequences. Elimination of the moisture intrusion alarm for the reactor building lower level does not significantly l

increase the probability of an accident because the probability that l

water could accumulate in this area is essentially unchanged. Design l features of the foundation, containment structure, and annulus drains 1

are intended to prevent entry of water into the reactor building, l

These features have prevented any water intrusion into this area. The ,

1 consequences of an accident would not be affected by elimination of the moisture intrusion alarm for the reactor building lower level because this equipment does not mitigate accidents or affect the accident sequences. The Safety Evaluation Supporting Amendment 9 to the referenced license did not rely on moisture intrusion monitoring and alarm features for any safety function or accident prevention or mitigation function. Environmental monitoring surveillance are  ;

unrelated to postulated accident sequences and cannot affect the probability or consequences of an accident. The correction of the l typographical error is unrelated to accident initiation and sequences and cannot affect the probability or consequences of any accident.

(2) The amaration of Enrico Fermi Atomic Power Plant. Unit 1. in accord -ea with the orsessed --- ' -t will not create the nossibility of a or different kind of accident from any accident oreviousit evaluated.

The proposed changes do not create the possibility of a new or different accident from any previously evaluated. With the exception of the allowance for composite environmental samples, which are unrelated to any potential accident sequence, these changes propose no new activities or new methods for performing existing activities.

4 Previous evaluations have considered the release of all of the radioactivity in the residual sodium due to postulated fire or other ,

catastrophe and release of radioactive water stored in the liquid waste tanks which bound the only possible radiological accidents at Fermi 1. For these reasons, no new or different type of accident is 1

created by these changes. ,

(3) The coeration of Enrico Fermi Atomic Power Plant. Unit 1. in Accordance with the proposed amendment will not irevolve a sianificant reduction in a marain of safety.

The proposed changes do not involve a significant reduction in a margin of safety. The changes to the primary system cover gas system technical specifications still ensure that any residual sodium is passivated by carbon dioxide. Changes to the alarms affect only monitoring functions and therefore do not cause a change to any parameter that could affect the margin of safety. Similarly, the environmental surveillances are unrelated to margin of safety. The correction of the typographical error is unrelated to margin of safety. For these reasons, the proposed changes do not involve a significant reduction in the margin of safety.

The let staff has reviewed the licensee's analysis and, based on this review, it appears that the three standards of 50.92(c) are satisfied. Therefore, the

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NRC staff proposes to determine that the amendment request involves no significant hazards consideration.

Lacal Public Document Room location: Monroe County Library System, 3700 South .

Custer Road, Nonroe, Michigan 48161. i Attorney for licensee: John Flynn, Esquire, Detroit Edison Company, 2000 Second Avenue, Detroit, Michigan 48226.

NRC Branch thief: Michael F. Weber ,

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