ML20215E387

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Forwards Util SER on Addition of Coagulant & body-feed Matl to RCS in Conjunction W/Operation of Defueling Water Cleanup Sys.Nrc Approval Requested by 861223.Fee Paid
ML20215E387
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 12/15/1986
From: Standerfer F
GENERAL PUBLIC UTILITIES CORP.
To: Travers W
Office of Nuclear Reactor Regulation
Shared Package
ML20215E389 List:
References
4410-86-L-0213, 4410-86-L-213, NUDOCS 8612220252
Download: ML20215E387 (2)


Text

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Route 441 South Middletown, Pennsylvania 17057-0191 717 944-7621 TELEX 84 2386 Writer's Direct Dial Number:

(717) 948-8461 4410-86-L-0213 Document ID 0144P December 15, 1986 TMI-2 Cleanup Project Directorate Attn: Dr. W. D. Travers Director US Nuclear Regulatory Commission c/o Three Mile Island Nuclear Station Middletown, PA 17057

Dear Dr. Travers:

Three Mlle Island Nuclear Station, Unit 2 (TMI-2)

Operating License No. DPR-73 Docket No. 50-320 Safety Evaluation Report For The Addition Of Coagulants To The Reactor Coolant System Attached for your review and approval is a Safety Evalu; tion Report (SER) for the addition of a coagulant and body-feed material to the Reactor Coolant System (RCS) in conjunction with the operation of the Defueling Hater Cleanup System (DHCS). The scope of this evaluation encompasses continuous treatment of the RCS with the coagulant and body-feed material. The coagulant addition is expected to improve the performance of the DHCS filters and enhance RCS water clarity.

We have been working for almost one year to develop the method of operating l the DHCS filter system so that water clarity can be provided for defueling operations. It appears that the use of a coagulant coupled with body feed is the solution. This conclusion is based on successful laboratory tests and a successful batch experiment performed last week between reactor coolant bleed tanks. I have put top priority on making DWCS system modifications so that the approach can be used on a full scale, continuous demonstration. We now expect the modified DHCS will be ready for operation on December 23, 1986. It is very important to the TMI-2 project that we obtain NRC approval of this SER (and subsequent operating procedures) before December 23, 1986.

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, - dr W. D. Travers December 15, 1986 4410-86-L-0213 The coagulant that proved successful in our tests does add a small amount of chloride to the treated water. This SER is based on maintaining reactor coolant chloride levels below the current Technical Specification limit of 5 ppm. If we find that there is an operating problem to meet this chloride limit we will review options on an expedited basis.

Per the requirements of 10 CFR 170, an application fee of $150.00 is enclosed.

Sincerely,

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F. R. Standerfer Vice President / Director, THI-2 FRS/RDH/sle Attachment Enclosed: GPU Nuclear Corp. Check No. 000409 l

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