ML19345A266

Forwards Response,Provided in Sargent & Lundy Engineers 790611 Ltr to Util,To IE Bulletin 79-04, Incorrect Weights for Swing Check Valves Mfg by Velan Engineering Corp. Check Valve Weights Correct & Have Been Used in Piping Analysis

ML19345A266
Person / Time
Site:	Byron, Braidwood
Issue date:	10/17/1980
From:	Merwin J COMMONWEALTH EDISON CO.
To:	Eric Lee NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-79-04, IEB-79-4, NUDOCS 8011070146
Download: ML19345A266 (6)

Text

, Comm:nwealth Edisen Co.

;, Braidwood Station R R 1. Box 81 6 Braceville. IL 60407 r -

Telephone 815/458 2801

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October 17, 1980 U.S. NRC Region III 799 Roosevelt Glen Ellyn, IL 60137 Attn: Ed Lee Construction Branch

Dear Mr Lee:

Her is the information you requested for NRC I.E. Bulletin No. 79-04.

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SANGENT & LUNDY EN(3INE E RM roumoto or retorm.Cm sanotut-isse 55 EAST MONROE STREET CHICAGO,lLUNOIS 60603 Tt6tewoNL - 312 269 2000 Caskt ADDRESS = S ARLUN-CHICAOo ,

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{l June ll, 1979 Project Nos. 4391/4392-00 4683/4684-00 Commonwealth Edison Company Byron /Braidwood Stations - Units 1 & 2 NRC IE Bulletin No. 79-04 Correct Weights for Swing Check Valves Manufactured by Velan Valve Corporation Mr. J. T. Westermeier Project Engineer Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690

Dear Mr. Westermeier:

In response to your May 3, 1979, request to review the subject bulletin, please be advised that even though the bulletin applies to 1500# swing check valves, we have reviewed all the valves being supplied by Velan Valve Corporation, through both Westinghouse NSSS and Sargent & Lundy specifications.

The following is in response to the five items required by the NRC for the check and globe valves being supplied by '

Velan Valve Corporation:

I. Check Valves

1. The Seismic Category I systems, where Velan Valve Corporation swing check valves are installed, are the Component Cooling (CC) and Boron Thermal 1 Generation (BR) systems. (,,

2. Valve weights, as shown on the drawings, are correct and have been used in the piping analysis. These weights have been verified by Velan Valve Corporation through recalculation and/or actual weighing.

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l CARGENT O LUNDY j i . E N GIN E E RS cHicaco 1 l

I Mr. J. T. Westermeier June 11, 1979 Commonwealth Edison Company Page 2 3-5. Not applicable, since valve weights remain unchanged.

II. Globe Valves

1. Velan Valve Corporation globe valves are used widely throughout Seismic Category I systems. The attached list shows the 60 valves per station, which have been identified as showing incorrect weights on the drawing.

The systems affected are the Chemical and Volume Control (CV), Safety Injection (SI), Chilled Water (WO), Essential Service Water (SX), and Auxiliary Feedwater (AF) systems.

2. Correct weights for the globe valves identified were determined by recalculation and/or actual weighing by Velan Valve Corporation and are shown on the attached listing. Applicable drawings have been redistributed showing the corrected weights.

3. The piping systems affected by (higher) valve weights are being evaluated through a final check process using the corrected weights. This final check is normally performed on all Seismic Category I systems using verified equipment'and installation data.

4. Modifications may be required on the piping systems' supports because of the above-described changes in valve weights. In all cases, piping and support stresses will be kept within the allowable limits per Section III.

5. Evaluation of the piping and supports is accomplished through using the PIPSYS computer code, which is described in Appendix D.8 of the FSAR.

We trust that the above will enable you to adequately respond to the NRC. If you have any questions, please contact me.

Yours very truly, 1

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.B. Jphnson Mechanical Project Engineer 2BJ:kde In duplicate Attachment Copies:

J. C. LaVallee (1/l) G. N. Nuestro (1/1)

L. Loziuk (1/1) B. Tatosian (1/1)

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SARGENT. & LUNDY ENGINEERS - -

3, cuiII o.": ."u o i s e o [, j TELEPHONE 387 269 2000 O{Q e

June 11, 197S Project Nos. 4391/4302-00 4633/edS4-00 Commonwealth Edison Ccapany Byror/Fraidwood St'st3 cns - Unit- 1& 2 NRC IE Bulletin No. 79-OL Correct 17eichts fofSt/ing Check Valves Manuf.ctured by Velan Valve Corporation 9

Mr. J. T. Westermeier '

Project Engineer Conmonwealth Edison Company P. O. Eox 757 Chicago, Illinois 60690

Dear Mr. Westermcier:

In respense to your May 3, 1979, request to revie. the subject bulletin, please be advised that even thou h the bulletin applies to 15004 swing check valves, we have revicued all the valves being supolled by Velan Valve Cerocratica, through both Westinghouse NSSS and Sargent & Lundy specifications.

The following is in response to the five items required by the ERC for the check and globe valves beinJ supplied by Velan Valve Corporation: ,

I. Check Valves .

1. The Seismic Category I syctems, where Valan Valve Corporation swing check valves are installed, are the Component Cocling (CC) and Boron 'Ihermal Generation (BR) sys t. ems .

2. Valve weights, as shown on the dravings, are correct and have been used in the piping cnalysis. These weights have been verified by Velan Valve Corporation thrcugh recalculation and/or actual weighing.

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C . :3 Mr. J. T. Westermeier June 11, 1979 . .

Co=monwealth Edison Company Page 2 3-5. Not applicable, since valve weights remain unchanged.

II. Globe Valves

1. Velan valve Corporation globe valves are used widely throughout Seismic Category I systems. The attached list shows the 60 valves per station, which have been identified as showing incorrect veichts on the drawing.

The systems affected are the Chenical and Volume Control (CV), Safety Injection (SI) , Chilled 1'ater (WO) , Essential Service Water (SX) , and Auxiliary Feedwater (AF) systems.

2. Correct weights for the globe valves identified were determined by recalculaticn and/or actual weighing by Velan Valve Corporation and are shown on the attached listing. Applicable drawings have been redistributed showing the corrected weights.

3. The piping systems affected by (higher) valve weights are being evaluated through a final check process using the corrected weights. This final check is normally performed on all Seismic Category I systems using verified equipment and installation data.

4. Modifications may be required on the piping systems' supports because of the above-described changes in valve weights. In all casest piping and support stresses will be kept within the allowable limits per Section III.

5. Evaluation of the piping and supports is accorolished through using the PIPSYS computer code, which is described in Appendix D.8 of the FSAR.

We trust that the above will enable you to adequately respond ,

to the NRC. If you have any questions, please contact me.

Yours very truly, R. B. JOHtJsoN R. B. Johnson Mechanical Project Engineer RBJ:kdc In duplicate

._ Attachment 3,_ J Copies: -

J. C.-Lavallee (1/1) G. N. Nuestro '(1/1) '

L. Loziuk (1/1) 'B. Tatosian (1/1)

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