ML20214B085

Forwards Wg Counsil to NRC Transmitting Wg Counsil to Cygna Re A-563 Grade a Nuts & S&W 870325 Project Memorandum 141 Concerning Unequal Shear Loading Effect on Richmond Inserts & Threaded Rods Used

ML20214B085
Person / Time
Site:	Comanche Peak
Issue date:	05/15/1987
From:	Wooldridge R WORSHAM, FORSYTHE, SAMPELS & WOOLRIDGE (FORMERLY
To:	Bloch P, Jordan W, Mccollum K Atomic Safety and Licensing Board Panel
References
CON-#287-3459 OL, NUDOCS 8705200111
Download: ML20214B085 (4)

Text

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~ANc'< '="-wa<M CECELsA J BRUNim May 15,1987 JOE 4 Da v i S twic M PgtteSON wattte w *M.fE Peter B. Bloch, Esquire Dr. Kenneth A. McCollom Chairman Administrative Judge Atomic Safety and Licensing Board 1107 West Knapp U.S. Nuclear Regulatory Commission Stillwater, Oklahoma 74075 Washington, D.C. 20555 Dr. Walter H. Jordan Elizabeth B. Johnson Administrative Judge Oak Ridge National Laboratory 881 West Outer Drive P. O. Box X, Building 3500 Oak Ridge, Tennessee 37830 Oak Ridge, Tennessee 37830 Re: Texas Utilities Electric Company, et al (Comanche Peak Steam Electric Station, Units 1 & 2): Docket Nos. 50-445 and 50 446 - 00

Dear Administrative Judges:

Attached, for your information, is a copy of letter dated May 14,1987 from W. G. Counsil to the U. S. Nuclear Regulatory Commission, transmitting copies of letter from W. G. Counsil to Cygna dated April 21,1987 concerning A-563 Grade A Nuts and Stone & Webster Engineering Corporation's Project Memorandum No.141 dated March 25, 1987 concerning Unequal Shear Loading Effect on Richmond Inserts and Threaded Rods Used in Conjunction with Tube Steel.

Copies of the documents referred to therein have been furnished to Ms.

Juanita Ellis and Cygna Energy Services, Inc.

Respectfuity submitt 8705200111 870515 7 gDR ADOCK 05000445 .

Robert A. Wooldridge RAW /kiw Enclosures cca Service List

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M Log # TXX-6452 P9 --

File # 10068

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ttIELECTRIC U,UiSNia,n, May 14, 1987 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk . . .

Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 COMANCHE PEAK CORRECTIVE ACTION PROGRAM . . .

RESOLUTION OF CONCERNS Gentlemen:

Enclosed are 15 copies of the following:

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1. Letter from W. G. Counsil to N. H. Williams dated April 21, 1987 concerning A-563 Grade A Nuts.-

2. Stone & Webster Engineering Corporation's Project Memorandum No. 141 dated-March 25, 1987, to all Comanche Peak Project Procedure Manual Holders concerning Unequal Shear Loading Effect on Richmond Inserts

and Threaded Rods Used in Conjunction with Tube Steel.

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Item 1 above provides 1nformation regarding the use of A-563 Grade A Nuts for resolution of a CYGNA issue. Item 2 provides the criteria by which a review of Richmond Inserts to Tube Connection Designs confirms that Unequal Shear Load Sharing is not a concern.

The Atomic Safety and Licensing Board will be notified of this transmittal per separate letter from our attorneys.

Very truly yours,

d. (p.

W. G. C unsil i

By:

D. R. Woodlan Supervisor, Docket Licensing JDS/mlh Enclosures c - Mr. R. D. Martin, Region IV Mr. D. L. Kelley, RI Region IV Mr. H. S. Phillips, RI - Region IV m) Nonh Olne Street I..H NI Dallas. Ictas 75N1

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gun 3VoDurdTGo YENf0M May 14, 1987 Page 1 of 1 Log # TXX-6409 P9

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File # 02260

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1UELECTRIC April 21, 1987 CYGHA Energy Services ATTN: Ms. N. H. Williams, Project Manager Comanche Peak Project 101 California Street, Suite 1000 San Francisco, CA 94111

SUBJECT:

RESOLUTION OF CYGNA A-563 GRADE A NUTS ISSUE

Dear Ms. Williams:

In the public. meeting between TU Electric and CYGNA held in Glen Rose, Texas on March 25, 1987, TU Electric committed to inspect for A-563 Grade A galvanized nuts in our Hardware Validation Program (HVP) to assure that these nuts are not used on safety related pipe supports. On the basis of this commitment, CYGNA closed their pipe support issue No. 28.

Subsequent to that meeting, SWEC . conducted a review of purchase orders issued for pipe support specifications (2323-MS-46A and 468) and found that galvanized A-563 Grade A or A-307 nuts had not been purchased for pipe supports. Therefore we have concluded that A-563 Grade A or A-307 galvanized nuts were not called for in the design of pipe supports and would not have been installed. In addition, all pipe support material is stored in a separate warehouse which eliminates the possibility that galvanized nuts may have been inadvertently issued for pipe support applications. To assure that A-563 or A-307 galvanized nuts are not used for future design modifications, SWEC has issued PM 146 to preclude their use.

We Grade consider our actions A galvanized nuts. toTherefore, have addressed CYGNA's concern on the use of A-563 longer required. inspection for these nuts in our HVP is no Very truly yours, .,

s e

/k V/ p r /

W. G. Counsil BSO/amb 400 N Olne Dalla , Tetas 75 01

L6iclosure & to YE-6052 i[May14,,1987 l

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STONE & WEasTER ENGINEERING CORPORATION - CHERRY HILL OPERATIONS CENTER PM-141 INTEROFFICE MEMORANDUM $0;25 a

• * " " 15454/15616 PROJECT MEMORANDUM NO. 141 SUBJECT CPSES - UNITS 1 AND 2 DATE March 25, 1987 UNEQUAL SHEAR LOADING EFFECT ON RICHMOND INSERTS AND THREADED RODS FROM RPKlause USED IN CONJUNCTION WITH TUBE STEEL All CPPP Manual Holders 0978-1545405-C4WPC Job Book M3.1 Job Book M3.2.7 The purpose of this memorandum is to provide additional criteria for the evaluation of Richmond inserts and threaded rods used in conjunction with i tube steel. These conservative criteria address any potential unequal shear loading on the inserts and threaded rods.

Effective immediately, the following additional criteria shall be adopted for Richmond insert connections used in conjunction with tube steel.

These criteria are not applicable for baseplate designs used in conjunc-tion with Richmond inserts and threaded rods or other anchorage, such as '

Hilti bolts.

1. Review the ratios of actual shear force to the allowable shear ,

force, V/V,, for the insert and the threaded rod. '

2. If both V/V ratios are less than or equal to 0.25, no further action is ac,cessary.

3. If a V/V ratio is greater than 0.25, double the shear ratio and perform The interaction equation check in accordance with Sec-tion 3.2 of Attachment 4-5 of CPPP-7, Revision 3, using this new shear ratio.

4. Project Service Group (PSG) shall be notified of any support for which V/V, > 0.25.

5. PSG shall maintain a log of these supports.

All other requirements of Attachment 4-5 remain in effect.

This memorandum will be incorporated into the next revision of CPPP-7.

N R. P. Klause Project Manager