ML20082M678

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Requests Relief from 831014 Revised Order Specifying Schedule for Completion of NUREG-0737,Item II.B.3, Post- Accident Sampling Capability. Extension Requested to Allow Completion by 850801.Justification Provided
ML20082M678
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 11/30/1983
From: Gucwa L
GEORGIA POWER CO.
To: Stolz J
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.3, TASK-TM NED-83-593, TAC-52320, TAC-52321, TAC-53478, TAC-53479, NUDOCS 8312060231
Download: ML20082M678 (2)


Text

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Georg:a Power Corrpary 333 Piedmont Avenue Atlanta, Cerg a 30306 Tefephone 404 E266526 Ma414ng Address-Poct Offre Bcx 4545 Atlanta. Georgta 30302 Georgia Power L T. Gucwa rte ruFum e4oc somm Manayer Nuclear Eng neenng NED 83-593 and Cbet Nuclear Eng neer November 30, 1983 Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Ccmnission Washington, D. C. 20555 NBC DOCKETS 50-321, 50-366 OPERATI!G LICENSES DPR-57, NPF-5 EIMIN I. HA'ICH NUCLEAR PLANT UNITS 1, 2 RBJUEST EDR RELIEF FROM THE SCHEDULE FOR NURBG-0737 ITEM II.B.3 IMPLEMENI'ATION Gentlemen:

Your letter of October 14, 1983 transmitted a revision to the " Order Confirming Licensee Comitments on Post 'IMI Related Issues".

The revised order specified December 1,1983 as the completion date for NURBG-0737 Item II.B.3, Post-Accident Sampling Capability. Confirming the November 28, 1983 discussion with the Hatch Licensing Project Manager, it is requested that the order be modified to allow completion of Item II.B.3 by August 1,1985, our justification for this request is as follows.

The installed Post-Accident Sample System (PASS), in conjunction with previously existing drywell hydrogen and oxygen concentration monitors, will provide sampling and anzlysis capability in accordance with Item II.B.3.

The PASS is an automated system which utilizes in-line instruments for the necessary analyses.

The PASS has performed most of its design functions individually; however, we have thus far been unable to complete an acceptable integrated sampling and analysis process.

Specific problems contributing to this difficulty include: (1) establishing reactor coolant sample flow through the excess flow check valve in the instrument line from which the sample is drawn, (2) control of reactor coolant sample pressure in the chemical analysis portion of the PASS, which has caused equipment failures due to over-pressurization, (3) erratic readings from flow and pressure instrumentation, and (4) difficulty in calibrating the reactor coolant hydrogen analyzer in accordance with vendor recomendations.

8312060231 831130 DR ADOCK 0500032 i O t

1 Georgia Power d Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz, Chief Operatirg Reactors Branch No. 4 Novenber 30, 1983 Page Two Extensive efforts to correct these and other problems in the existing PASS design have met with little success. We therefore feel that changes in the PASS engineerire design are necessary to achieve the desired level of reliability.

The twenty month extension request.is based on the time required for:

(1) a complete, systematic review of the PASS design to identify necessary changes, (2) engineering for the design changes, (3) lead time for parts procurement, (4) our projected schedule for plant shutdowns, (5) installation

time, (6) calibration and operability verification procedures developnent,

(7) sufficient testing to ensure that the PASS operates at a high level of reliabilitf, and (8) personnel training.

The reque=ted schedule extension would not constitute a threat to the health and safety of the public because of the low probability of an accident recuiring the use of the PASS and the availability of interim sanpling and analysis measures which were established in response to NUREG-0578.

Please contact this office if there are any questions.

Very truly yours,

/*C k w L. T. Gucwa JH/jh xc: J. T. Beckham, Jr.

H. C. Nix, Jr.

J. P. O'Reilly (NRC-Region II)

Senior Resident Inspector P. D. Rice 700775

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