ML20134C675

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Forwards Safety Evaluation & Approval of Proposed Design, Installation & Testing of Defueling Water Cleanup Sys. Operation of Sys Contingent Upon Approval of Fuel Canister Rept,Heavy Load Handling & Boron Dilution Hazards Analysis
ML20134C675
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 08/06/1985
From: Travers W
Office of Nuclear Reactor Regulation
To: Standerfer F
GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20134C677 List:
References
CON-NRC-TMI-85-055, CON-NRC-TMI-85-55 NUDOCS 8508160397
Download: ML20134C675 (2)


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DN 50-320 NRC PDR Local PDR DCS TMI HQ r/f TMI Site r/f BJSnyder August 6, 1985 WDTravers NRC/TMI 85-055 MTMasnik RAWeller PJGrant RCook Docket No. 50-320 CCowgill LChandler Mr. F. R. Standerfer IE Vice President / Director M-Town Office Three Mile Island Unit 2 Service List GPU Nuclear Corporation JAThomas P.O. Box 480 Middletown, PA 17057

Dear Mr. Standerfer:

Subject:

Defueling Water Cleanup System f

Reference:

(a) Letter 4410-85-L-0005, F. Standerfer to B. Snyder, Defueling Water Cleanup System Technical Evaluation Report, dated i

January 14, 1985 (b) Letter 4410-85-L-0099, F. Standerfer to B. Snyder, Technical Evaluation Report for the Defueling Water Cleanup System, dated April 26, 1985 (c) Letter 4410-85-L-0119 F. Standerfer to 8. Snyder Technical Evaluation Report for the Defueling Water Cleanup Systee, dated May 28, 1985 (d) Letter 4410-85-L-0125, F. Standerfer to B. Snyder, Technical Evaluation Report for the Defueling Water Cleanup System, dated June 13, 1985 This letter is in response to references (a) through (d).

Reference (a) was your initial submittal of the Defueling Water Cleanup System (DWCS) Technical Evaluation Report (TER) for NRC staff review and approval.

References (b), (c), and (d) submitted subsequent revisions to the subject TER for staff review. The TER addressed the general design and operation of the system, consequences of various system failures, criticality and decay heat removal considerations, boron dilution, heavy load handling, radioactive releases, and both off-site and on-site radiation dose assessment. Additional information was provided in discussions between members of our technical staffs on April 3,1985, during which various questions and issues relating to the system were addressed. We have not completed our review of the DWCS filter canister criticality analysis. Our evaluation of this analysis will be I presented in our response to your Fuel Canister TER which was submitted for our review in your letter 4410-85-L-0067, dated April 9, 1985. In addition, two other areas relating to DWCS operation require further review. First, we 8508160397 PDR e50806 P

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. Mr. F. R, Standerf;.r -August 6, 1985 have not complcted our review of the consequences af heavy load handling "ov:r the fuel storage racks when fuel material is present. Cur review in this area '

may affect your plans for replacement of spent filter canisters in(the DWCS. '

Second, our approval of system operating procedures relating to chemistry sampling frequency will be dependent upon your submittal of the revised' boron},,

dilution hazards analys'.; for our review. .This letter transmits our safety -

evaluation and our approval of the proposed design, installation, and testing >

of the DWCS. Our review was based on your description of the proposed system presented in revision 6 of the TER and revision 3 of the associated system descriptions 15737-2-M72-DWC01 and 1537-2-M72-DWC02. We have determined that .-

the use of this system does not pose a risk to the health and safety of the public, nor does it exceed the scope of activities and the associated environmental impacts which were considered in the staff's Progranmatic Environmental Impact Statement (PEIS). Operation of the system to process water from the reactor coolant system will be contingent upon our approval 6f the fuel canister TER, resolution of heavy load handling issues, review of the boron dilution hazards analysis, and submittal of the related procedures subject to our approval per Technical Specification 6.8.2.

We are aware of your intention to begin partial operation of the DWCS (i.e.,

reactor vessel filtration) prior to full system installation. We have reviewed the proposed interim processing scheme, as shown on your piping and instrument drawings 15737-2-H75-DWC03 and 15737-2-H75-DWC04, revision 0, and- '

have determined that the conclusions presented in our safety evaluation for the full system are also valid for the partial system operation. We therefore approve the interim processing plans subject to the sarae conditions discussed -

above for the complete system. '

Sincerely, #

William D. Travers ~

Deputy Program Director - . -

THI Program Office ", +

cc: T. F. Deamitt -

R. E. Rogan S. Levin -

W. H. Linton r. .

J. J. Byrne -

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