ML20211B350

Forwards Safety Evaluation Approving Initial Use of Heavy Duty Tong Tool,Heavy Duty Spade Bucket & Hydraulic Impact Chisel W/Stated Restrictions for Bulk Defueling Operations

ML20211B350
Person / Time
Site:	Three Mile Island
Issue date:	06/04/1986
From:	Travers W Office of Nuclear Reactor Regulation
To:	Standerfer F GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20211B356	List: ML20211B350 ML20211B364
References
CON-NRC-TMI-86-055, CON-NRC-TMI-86-55 NUDOCS 8606110608
Download: ML20211B350 (2)

Text

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DISTRIBUTION:

T Docket No. 50-320 f- NRC PDR

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June 4, 1986 TMI Site r/f NRC/TMI-86-055 WDTravers MTMasnik Docket No. 50-320 RHall JWhite m CCowgill LChandler Mr. F. R. Standerfer IE s v Vice President / Director, THI-2 ACRS GPU Nuclear Corporation M-Town Office P. O. Box 480 Middletown, PA 17057

Subject:

Heavy Duty Tong Tool, Heavy Duty Spade Bucket, Hydraulic

. Impact Chisel By letter dated June 2,1986, GPU Nuclear requested NRC approval for use of

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the subject tools in performing limited bulk defueling operations on the hard crust layer of the damaged THI-2 core. Approval for the use of the hydraulic impact chisel had previously been grar.ted by the staff in a letter dated January 30, 1986; however, the use of that tool has been restricted to those activities covered by the staff's approval of the GPUN Safety Evaluation

, Report (SER) for Early Defueling. The staff is currently reviewing Revision 10 to the Defueling SER submitted by GPU on May 15, 1986, which incorporates changes and additions in suppor' of proposed bulk defueling activities.

M With several weeks available price .o your planned commencement of core

, stratification sample acquisition 1.:tivities and the fact that " pick-in-place" J defueling is essentially completeu, we understand that you propose to use the subject tools for limited bulk defueling activities in advance of our approval I of the revised SER, in order to make the most efficient use of time and resources. It is also our understanding that your primary purpose in using '

these tools at this time will be to develop operational experience and '

identify potential problems with their use, although actual defueling activities, including loading and transfer of canisters, may also be

performed.

b The staff has reviewed your proposed use of these tools as documented in your letter of June 2,1986 and has also completed a preliminary review of the 5 applicable portions of Revision 10 to your Defueling SER. Based on our g review, we approve your proposed initial use of the subject defueling tools, with the following restrictions:

? 1. The lifting force applied in using these tools must not exceed 2000 t: pounds in order to minimize the potential for accidental failure of an incore instrument line (as proposed in your letter of June 2,1986); and

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y Mr. F. R. Standerf;r Juna 4, 1986

2. ' You shall provide a report or presentation to the NRC staff at the end of the activity period (estimated at 2-3 weeks) assessing the experience j gained from these initial bulk defueling activities.

I In the event of a significant slip (greater than one week) in the schedule for core stratification sample acquisition activities or following their completion, NRC approval will again be required to continue bulk defueling activities with these tools, pending our approval of your Defueling SER-Revision 10. Hotwithstanding the physical constraints of the core bore equipment, initial bulk defueling may not take place concurrently with core

. bore activities. As documented in our enclosed safety evaluation, we find that the potential risks resulting from the proposed limited bulk defueling

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activities are acceptably low during the period that they will be performed.

We conclude that the proposed activities can be conducted without significant risk to the public health and safety and that .they fall within the scope of activities considered in the Programmatic Environmental Impact Statement (PEIS). The proposed activities may comence subject to our approval of the related procedures in accordance with Technical Specification 6.8.2.

Sincerely, DRitWAr 81tHtf tff.

WiMam D. haverg William D. Travers', Director TMI-2 Cleanup project Directorate

Enclosure:

As stated cc: T. F. Demmitt R. E. Rogan S. Levin W. H. Linton J. J. Byrne A. W. Hiller Service Distribution List (seeattached)

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NRC FORM 318 (10 80) NRCM O24 OFFICIAL RECORD COPY _ __ __

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