ML20032D893
| ML20032D893 | |
| Person / Time | |
|---|---|
| Site: | Black Fox |
| Issue date: | 11/05/1981 |
| From: | Jason West PUBLIC SERVICE CO. OF OKLAHOMA |
| To: | |
| Shared Package | |
| ML20032D886 | List: |
| References | |
| NUDOCS 8111180259 | |
| Download: ML20032D893 (7) | |
Text
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000KETED UNITED STATES OF AMERICA USHRC NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING EAlW -9 P12i07 MFICE OF SECRETA 9Y In the Matter of the Application of
)
00CKEntiG & SERV:CE Publ.'c Service Company of Oklahoma,
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BEANCH Associated Electric Cooperative, Inc. )
Docket Nos. STN 50-556 and
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STN 50-557 Western Farmers Electric Cooperative
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(Black Fox Station, Units 1 and 2)
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AFFIDAVIT OF JOHN B. WEST, PH.D.
District of Columbia:
SS i
I, John B. West, of lawful age and being first duly sworn, depose and say that:
1.
My name is John B. West.
I reside at 7901 South Yukon, Tulsa, Oklahoma.
I am employed by Public Service Company of Oklahoma ("PSO") as Manager, Black Fox Station Engineering, a position I have held since 1976.
Prior to that, I was a member of the faculty of the School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma, for over twenty-one years.
I was also employed as a graduate assistant for four years at the Ames Laboratory, Iowa State University; and by the General Electric Company l
on the Chemical and Metallurgical Program and at the Knolls Atomic Power Laboratory for about one year each.
I received B.S. and Ph.D. degrees in Chemical Engineering from Iowa State University. I am a registered Professional Engineer in the State of Oklahoma.
8111180259 011105 PDR ADOCK 05000556 o
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. 2.
I have previously testified in this pro-ceeding with respect to Board Question 15-1 and, in particu-lar, I have testified to my interaction with the General Electric Company with respect to determining the program for mitigating the effects of intergranular stress corrosion cracking ("IGSCC") on the reactor recirculation piping system for the Black Fox Station (See Tr. 5941-5943; and my supplemental testimony following Tr. 8582).
In my previous testimony, I indicated that Public Service Company was continuing to investigate the type of stainless steel material to be used for the reactor recirculation piping system for the Black Fox Fox Station.
Dr. Gordon of the General Electric Company had testified concerning mitigating measures that might be utilized when using Type 304 stainless steel for the reactor recirculation piping system.
These measures were solution heat treatment, corrosion resistant cladding, and heat sink welding.
My prior testimony indicated that I had reservations with respect to the u e of heat sink welding and that Public Servict Company of Oklahoma would review the situation to determine the most desirable solution to mitigate the effects of IGSCC.
3.
Subsequent to the close of the record in this proceeding, General Electric submitted four options to PSO for consideration.
These were:
- e A.
The type 304 stainless steel material for the recirculation system piping would be fabricated and installed, as discussed in Dr. Gordon's testimony, using IGSCC mitigating measures, i.e.,
solution heat treatment, corrosion resistant cladding, and heat sink welding.
B.
The type 504 stainless steel material for the recirculation system piping would be fabricated with solution heat treatment, corrosion resistant cladding, and partial replacement by 316K stainless steel.
This approach would delete any use of the heat sink welding technique.
C.
The type 304 stainless steel material proposed for the recirculation system piping would be augmented by adding 316K stainless steel short-spool pieces and fittings in order to delete all heat sink welding and corrosion resistant clad weld joints.
D.
The recirculation system piping would be fabricated from 316K stainless steel in lieu of type 304.
No heat sink welding
< and corrosion resistant clad methods would be used.
4.
After consideration of the four options, I determined that option D was the most desirable and acceptable option.
Option A was rejected because it includes the use of heat sink welding, a method which is unaccentable because of the lack of field experience using this welding technique.
Option D is more desirable than Option B because it eliminates the fit-up and inspection problems associated with the use of corrosion resistant cladding.
Option D is preferable to Option C because it reduces the number of welds, thereby minimizing the potential for IGSCC and reducing in-service inspection requirements.
5.
Type 304 stainless steel may become susceptible to IGSCC during welding as a result of carbon in the material forming chromium carbide, thereby depleting chromium at the i
grain boundary and decreasing the material's resistance to corrosion.
The potential for IGSCC can be reduced by limiting the carbon content of the stainless steel.
The 316K stainless steel proposed by the General Electric Company is a material with a closely controlled low-carbon content.
By closely controlling the carbon content, it is possible to retain the resistance to IGSCC while maintaining the strength of the
. 316K stainless steel equal to or better than 304 stainless steel.
6.
I have concluded that option D, while the most costly of the alternatives, provides the best currently available technical solution to mitigate IGSCC problems.
I recommended to the Executive Vice President that PSO select 316K stainless steel for the recirculation system piping for Black Fox Station.
My reccmmendation was accepted by the Executive Vice President on July 27, 1979, and he directed that steps be taken to revise the contract with the General Electric Company to specify the use of 316K material for the Black Fox Station reactor recirculation system.
This was accomplished soon after that date.
The fabrication of most of the recirculation system piping using 316K stainless steel for Units 1 and 2 has been completed, and it is being stored at the Black Fox Station site.
Executed at Washington, D.
C.
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Subscribed and sworn to before me this 5th day of Novemb.er, 1981.
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j eau nc Av/bakP gNotary Public in and for the District of Columbia My commission expires
/N L
e UNITED STATES OF AMERICA 0.{TED NUCLEAR REGULATORY COMMISSION 11 R-9 R2:(9 BEFORE THE ATOMIC SAFETY AND LICENSING BOARD orrlCE 0F'SECRETARf DOCKEIiNG & SERVICE In the Matter of the Application of
)
Public Service Company of Oklahoma,
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Associated Electric Cooperative, Inc. )
Docket Nos. STN 50-556 and
)
STN 50-557 Western Farmers Electric Cooperative
)
)
(Black Fox Station, Units 1 and 2)
)
CERTIFICATE OF SERVICE I hereby certify that copies of APPLICANTS '
MOTION TO REOPEN THE RECORD in the above-captioned pro-ceeding were served upon the persons shown below by deposit in the United States mail, first-class postage prepaid, this 5th day of November, 1981.
Sheldon J. Wolfe, Esquire Docketing and Service Section Administrative Judge Office of the Secretary of Atomic Safety and Licensing the Commission Board Panel U. S.
Nuclear Regulatory U.
S.
Nuclear Regulatory Commission Commission Washinguon, D.
C.
20555 Washington, D. C.
20555 Atoraic Safety and Licensing Mr. Frederick J.
Shon Board Panel Administrative Judge U.
S. Nuclear Regulatory Atomic Safety and Licensing Commission Board Panel Washington, D.
C.
20555 U.
S.
Nuclear Regulatory Commission Atomic Safety and Licensing Washington, D.
C.
20555 Appeal Board Panel U.
S.
Nuclear Regulatory Dr. Paul W.
Purdom Commission Administrative Judge Washington, D.
C.
20555 U.
S.
Nuclear Regulatory Commission c/o Environmental Studies Group Drexel University 32nd and Chestnut Streets Philadelphia, PA 19104
, Dennis C. Dambly, Esquire James H.
Thessin, Esquira Counsel for NRC Staff Counsel for NRC Staff U. S. Nuclear Regulatory U. S. Nuclear Re>Julatory Commission Commission Washington, D. C.
20555 Washington, D. C.
20555 Joseph R.
Farris, Esquire Mr. Maynard Human Feldman, Hall, Franden, Reed General Manager
& Woodard Western Farmers E?ectric 816 Enterprise Building Cooperative Tulsa, Oklahoma 74103 P. O. Eux 429 Andarko, Oklahoma 73005 Mr. Clyde Wisner Public Affairs Officer Mr. Gerald F.
Diddle NRC Region 4 General Manager 611 Ryan Plaza Drive Associated Electric Suite 1000 Cooperative, Inc.
Arlington, Texas 76011 P. O. Box 754 Springfield, Missouri 65801 Mrs. Carrie Dickerson Citizens Action for Safe Michael L.
Bardrick, Esquire Energy, Inc.
Assistant Attorney General P.
O. Box 924 State of Oklahoma Claremore, Oklahoma 74107 112 State Capitol Building Oklahoma City, Oklahoma 73105 Mrs. Ilene H. Younghein 3900 Cashion Place Dr. John C.
Zink Oklahoma City, Oklahoma 73112 Manager, Nuclear Licensing Public Service Company of Mr. Lawrence Burrell Oklahoma Route 1, Box 197 P. O. Box 201 Fairview, Oklahoma 73737 Tulsa, Oklahoma 74102 i
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