ML20054F406
| ML20054F406 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/11/1982 |
| From: | J. J. Barton GENERAL PUBLIC UTILITIES CORP. |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| References | |
| 4400-82-L-0096, 4400-82-L-96, NUDOCS 8206160290 | |
| Download: ML20054F406 (2) | |
Text
_ _.
GPU Nuclear P.O. Box 480
'j -
g gp A
Middletown Pennsylvania 17057 717-944 7621 Writer's Direct Dial Number:
June 11, 1982 g
N 4400-82-L-0096 8
b5 m
==
TMI Program Office 89 Attn:
Mr. L. H. Barrett, Deputy Program Director b
?,:. 9 li" U. S. Nuclear Regulatory Commission u
c/o Three Mile Island Nuclear Station d
Middletown, Pennsylvania 17057 co x
Dear Sir:
Three Mile Island Nucleer Station, Unit 2 (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Contingency Motor Tube Closure GPU letter, 4400-82-L-0080, requested NRC approval to use ANSI B31.1 Power Piping Code in place of ASME III Class A in the design and fabrication of the Contingency Motor Tube Closure. As an attachment to this letter, we included the design requirements for the closure.
However, since this letter was issued some modifications have been made to the design requirements for the closure. These revised requirements are attached for you use in reviewing the previously submitted request.
- erely,
/
\\
J
. Barton ng Director, TMI-2 JJB:JJB:djb Attachment cc:
Dr. B. J. Snyder, Program Director - TMI Program Office 0009 8206160290 020611 PDR ADOCK 05000320 P
PDR GPU Nuclear is a part of the General Pubhc Utihhes System i
1 TEMPORARY CONTINGENCY RCS MOTOR TUBE CLOSURE REQUIREMENTS:
A.
Design Requirements:
1.
A leadscrew clamp shall be provided with each contingency closure. The clamp shall be designed to support a cut leadscrew and to allow installation of the contingency closure. The clamp shall be designed to sur, ort a deadload weight of 200 pounds.
2.
The closures shall be designated for oper9 ing conditions of at least 600 psig and 280*F.
3.
The closure shall be based on length of leadscrew protruding from the motor tube following leadscrew cutting, compatible with the design of the band saw mounting structure.
/ 4.
The closure shall be designed and fabricated in accordance with the requirements of the ANSI B31.1 Power Piping Code.
The closures shall be hydrostatically tested to 150% of i
max. op. conditions for a period of not less than 30 minutes; demineralized water shall be used for hydrostatic tests.
5.
After testing and before shipment, closures shall be cleaned using a suitable organic solvent, such as acetone, to remove any dirt, oil, residue, metal chips, or other deleterious contaminants. Closures not immediately packaged shall be protected from further contamination.
6.
Closures shall not be designed with venting capabilities.
7.
Closures shall be designed for manual installation.
8.
Closures shall not use permanent or semi-permanent sealants (e.g., glues, tars, etc.).
9.
Closures shall not require seal welding.
10.
Closures shall not be designed to any seismic requirements.
1 11.
Closures shall be fabricated of materials compatible with the RCS water chemistry at TMI-2 (stainless steels A479-type 403 or 410 (clamp); A479-type 304 (closure); and A453-grade 660, condition B (closure spanner nut)).
12.
Material certificates of compliance with ASTM specifications shall be provided for all closure materials.
I