ML20101M369

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Submits Info Describing Specific Reviews Performed to Complete Evaluation of Head & Internals Handling Fixture. Analysis Concluded That All Members & Welds Satisfied Design Safety Factor Criteria of ANSI N14.6-1978
ML20101M369
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 12/21/1984
From: Hukill H
GENERAL PUBLIC UTILITIES CORP.
To: Stolz J
Office of Nuclear Reactor Regulation
References
REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR 5211-84-2297, NUDOCS 8501030064
Download: ML20101M369 (2)


Text

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GPU Nuclear Corporation NggIg{ Post Office Box 480 Route 441 South Middletown, Pennsylvania 17057 0191 717 944 7621 TELEX 84-2386 Writer's Direct Dial Number:

December 21, 1984 5211-84-2297 Office of Nuclear Reactor Regulation Attn: J. F. Stolz, Chief Division of Licensing U. S. Nuclear Regulatory Commission Washington, DC 20555

Dear Sir:

Three Mile Island Nuclear Station, Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Control of Heavy Loads - Lifting Devices As a result of discussions with Franklin Research Center, below is infor-mation describing specific reviews that have been performed to complete the evaluation of the Head and Internals Handling Fixture (tripod).

A consultant for GPU Nuclear performed stress analyses for the special lifting devices used in the TMI-1 reactor building. The analysis of the Head and Internals Handling Fixture (tripod) was performed using dimen-sional information from the vendor's design drawings and the analysis concluded that all members and welds satisfied the design safety factor criteria of ANSI N14.6-1978.

A comparison of as-built weld sizes to design sizes revealed that some of the welds were smaller than the design specification. An analysis l

l by GPU Nuclear has been performed to determine safety factor compliance I with ANSI N14.6.

l l GPU Nuclear performed an evaluation of welds of TMI-1 " Tripod" lifting device by comparing it to existing B&W calculations 32-1145001-00 for TMI-2 " Tripod", and found that the subject TMI-1 " Tripod" meets the y safety factor of 3 (three) as required by NUREG-0612.

recao.

I gg The above results are based on the following information:

eo m$ 1. One percent dynamic load factor was estimated for the crane design.

L j 80 2. Actual TMI-1 " Tripod" weld sizes were used in dbj Q@ evaluation.

TMI-1 and TMI-2 Tripods are identical in all aspects ' h o a: 3.

$@ a., except for weld sizes.

l l GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation L

.3 J. F. Stolz 5211-84-2297 The stress analyses in conjunction with ongoing inspection and maintenance are judged to provide an adequate level of confidence in the reliability and integrity of the " tripod" lifting device.

Additionally, the Fuel Handling Building spent fuel cask pit gate lifting lugs have been modified as committed in item 2.2.3 of GPUN Response to NUREG-0612. GPUN procedure 1057-2, " Fuel Handling Building Crane Opera-tion" will be modified to include instructions on the use of rigging components (slings, shackles), when lifting these gates,in January,1985.

Further by GPUN letter dated March 15, 1984 (5211-84-2072), GPUN projected revision of the electrical interlock system limits (including removal of the travel path to the decontamination pit at elevation 348')

and associated procedures would be completed by December 15, 1984.

However, GPUN now projects that this Item Sa & b will be completed in October 1985.

Si cerely, I

H. D. Hukill f

Director, TMI-1 HDH/ RAS /kds cc: C. Bomberger (Westec)

R. Conte J. Van Vliet e

l I

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