ML19319A961

Requests Review of Util Evaluation of post-LOCA Boron Control Sys Which Concludes Positive Flow Indication Is Not Required

ML19319A961
Person / Time
Site:	Oconee
Issue date:	08/19/1976
From:	Zech G Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
ORB-1-252, NUDOCS 7912300255
Download: ML19319A961 (2)

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r AUG 191976 2-i TAR ORB-1-252 continued As part of our review of the Oconee Unit 1 Description of Request:

ECCS analysis we evaluated the plant desipp to assure long tem boron dilution following a LOCA. By letter dated February 17,1976, we advised the licensee that their proposed '

design to achieve boron dilution was The design consisted of a acceptable.

redundant hot leg drain network from the decay heat drop line to the reactor lie also indicated, however.

building sump.

g' DISTRIBUTION that the licensee should provide a positive Docket File indication that the system is in fact j

ORBil Reading working when called upon to operate KRGoller following a LOCA.

TJCarter DEisenhut By letter dated March 4,1976. the licensee RLBaer advised us that equi;r.cnt to provide SMSheppard positive flow indication would not be j

i ASchwencer installed prior to Oconee 1 cycle 3 operation. (Tentatively scheduled for GZech

/VStello the spring 4f 1977). They also indicated that the equipment could not be installed for Oconce Unit 2 cycle 2 operation which i

cemenced on June 30, 1976. This was I

acce'ptable to us provided that pre-l operational tests were conducted prior to resunption of plant operations.

By letter dated August 6.197G, the licensee t

I has provided an evaluation of the post-LOCA l

boron control systen for the Oconea facilities F

in which they have concluded that the l

positive flow indication is not required.

i You are requested to review the licensee's evaluation and provide your conclusions i

regarding the need for a positive indication i

of flow in the hot leg drain network following a LOCA.

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