ML20151L773
| ML20151L773 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 08/01/1997 |
| From: | Dick G NRC (Affiliation Not Assigned) |
| To: | Johnson I COMMONWEALTH EDISON CO. |
| References | |
| TAC-M99168, TAC-M99169, TAC-M99170, TAC-M99171, NUDOCS 9708070190 | |
| Download: ML20151L773 (6) | |
Text
.
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e August 1, 1997 i
Ms. Irene M. Johnson, Acting Manager Nuclear Regulatory Services 1
Commonwealth Edison Company Executive Towers West III 1400 Opus Place, Suite 500
{
Downers Grove, IL 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING CREDIT FOR SOLUBLE BORON IN THE SPENT FUEL POOL - BYRON AND BRAIDWOOD STATIONS, UNITS 1 AND 2 (TAC NOS. M99170, M99171, M99168 AND M99169)
Dear Ms. Johnson:
i By letter dated June 30, 1997, Commonwealth Edison Company (Comed) submitted a request for Byron, Units 1 and 2, and Braidwood, Units 1 and 2, to revise the technical specifications and the bases to permit Comed to take 1
credit for soluble boron in the spent fuel pool to maintain an acceptable 1
margin of criticality.
During the course of our review, we have identified
{
the need for further information as discussed in the enclosed request for j
]
additional information (RAI).
Please indicate when we may expect a response to the RAI so that we may schedule the completion of our review of your submittal.
1 Sincerely, ORIGINAL SIGNED BY:
4 George F. Dick, Jr., Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455,
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t STN 50-456, STN 50-457
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Enclosure:
-f~f'j cc w/ enc 1:
see next page l llllll]lll]lll]ll(lllllll ll Distribution:
Docket File PUBLIC PDIII-2 r/f(i)
JRoe, JWR EAdensam, EGAl RCapra CMoore GDick OGC, 015B18 ACRS, T2E26 SBailey RAssa LKopp RLanksbury, RIII T3 rec 31we a copy of this document, ip(icate,in the box:
"C" = Copy without enclosures "E" a Copy with enclosures "W" = No copy 0FFICE PM:POIII-2/,lfE LA\\PDRII-2 l v3RXB of l
D:PDIII-2 l9 NAME GDICK MA W
JLYONS LA RCAPRA W DATE OF/v//97' 07/$1/97 07/31/97 0$/07 /97 X)CUMENT NAME: BB99170.LTR OFFICIAL RECORD COPY 9700070190 970801 f
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_ _ _ _ _ _ _....~.~ _ _._._.,
i i t August 1, 1997 k
Ms. Irene M. Johnson, Acting Manager Nuclear Regulatory Services Commonwealth Edison Company i
Executive Towers West III 1400 Opus Place, Suite 500 Downers Grove, IL 60515 I,
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING CREDIT FOR SOLUBLE BORON IN THE SPENT FUEL POOL - BYRON AND BRAIDWOOD STATIONS, UNITS 1 AND 2 (TAC NOS. M99170, M99171, M99168 AND M99169)
Dear Ms. Johnson:
By letter dated June 30, 1997, Commonwealth Edison Company (Comed) l submitted a request for Byron, Units 1 and 2, and Braidwood, Units 1 and 2, to revise the technical specifications and the bases to permit Comed to take j
credit for soluble boron in the spent fuel pool to maintain an acceptable j
margin of criticality. During the course of our review, we have identified l
the need for further information as discussed in the enclosed request for 1
additional information (RAI).
Please indicate when we may expect a response 4,
to the RAI so that we may schedule the completion of our review of your i
submittal.
i j
Sincerely, l
1 ORIGINAL SIGNED BY:
4 l
George F. Dick, Jr., Project Manager 4"
Project Directorate III-2 Division of Reactor Projects - III/IV j
Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455, l
STN 50-456, STN 50-457
[
Enclosure:
RAI L
cc w/ enc 1:
see next page h
Distribution:
Docket File PUBLIC PDIII-2 r/f(i)
JRoe, JWR EAdensam, EGA1 RCapra CMoore GDick OGC, 015B18 ACRS, T2E26 SBailey RAssa LKopp RLanksbury, RIII Ta recefwe e copy of this document, ipulieste in the bon ec= = Copy without enclosures "E" s Copy with enclosures "W" = No copy 0FFICE PM:PDIII-#, !E LAiPI$11-2 l L/3RXB m/ l D:PDIII-2 lE NAME GDICK AM (N0 ORT JLYONS A RCAPRA F DATE
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07/g1/97 07/31/97 0$/e7 /97 4
)DCUMENT 1AME:
BB99170.LTR OFFICIAL RECORD COPY
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NUCLEAR REGULATORY COMMISSION t
WASHtNGTON, D.C. 30666-0001 p
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%,+ g August 1, 1997 Ms. Irene M. Johnson, Acting Manager Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West III 1400 Opus Place, Suite 500 Downers Grove, IL 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING CREDIT FOR SOLUBLE BORON IN THE SPENT FUEL P0OL - BYRON AND BRAIDWOOD STATIONS, UNITS 1 AND 2 (TAC NOS. M99170, M99171, M99168 AND M99169)
Dear Ms. Johnson:
By letter dated June 30, 1997, Commonwealth Edison Company (Comed) submitted a request for Byron, Units 1 and 2, and Braidwood, Units 1 and 2, to revise the technical specifications and the bases to permit Comed to take 3
credit for soluble boron in the spent fuel pool to maintain an acceptable i
margin of criticality. During the course of our review, we have identified the need for further information as discussed in the enclosed request for additional information (RAI).
Please indicate when we may expect a response j
to the RAI so that we may schedule the completion of our review of your submittal.
Sincerely, "l-Geo F. Dick, J., Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455, STN 50-456, STN 50-457
Enclosure:
RAI cc w/ enc 1:
see next page
I. Johnson Byron /Braidwood Power Stations Commonwealth Edison Company cc:
Mr. William P. Poirier, Director George L. Edgar Westinghouse Electric Corporation Morgan, Lewis and Bochius Energy Systems Business Unit 1800 M Street, N.W.
Post Office Box 355, Bay 236 West Washington, DC 20036 i
Pittsburgh, Pennsylvania 15230 i
Attorney General Joseph Gallo 500 South Second Street 3
Gallo & Ross Springfield, Illinois 62701 l
i 1250 Eye St., N.W.
Suite 302 EIS Review Coordinator l
Washington, DC 20005 U.S. Environmental Protection Agency 77 W. Jackson Blvd.
Michael I. Miller, Esquire Chicago, Illinois 60604-3590 Sidley and Austin One First National Plaza Illinois Department of j
Chicago, Illinois 60603 Nuclear Safety _
j Office of Nuclear Facility Safety Howard A. Learner 1035 Outer Park Drive Environmental law and Policy Springfield, Illinois 62704 Center of the Midwest 4
203 North LaSalle Street Comonwealth Edison Company l
Suite 1390 Byron Station Manager i
Chicago, Illinois 60601 4450 North German Church Road i
Byron, Illinois 61010 U.S. Nuclear Regulatory Commission a
l Byron Resident Inspectors Office Kenneth Graesser, Site Vice President j
4448 North German Church Road Byron Station Byron, Illinois 61010-9750 Comonwealth Edison Station 4450 N. German Church Road Regional Administrator, Region III Byron, Illinois 61010 U.S. Nuclear Regulatory Comission i
801 Warrenville Road U.S. Nuclear Regulatory Comission Lisle, Illinois 60532-4351 Braidwood Resident Inspectors Office i
Rural Route #1, Box 79 l
Ms. Lorraine Creek Braceville, Illinois 60407 Rt. 1, Box 182 1
Manteno, Illinois 60950 Mr. Ron Stephens Illinois Emergency Services Chairman, Ogle County Board and Disaster Agency i
i Post Office Box 357 110 East Adams Street Oregon, Illinois 61061 Springfield, Illinois 62706 l
Mrs. Phillip B. Johnson Chairman 1907 Stratford Lane Will County Board of Supervisors i
Rockford, Illinois 61107 Will County Board Courthouse Joliet, Illinois 60434
}
Commonwealth Edison Company Braidwood Station Manager Rt. 1, Box 84 j
Braceville, Illinois 60407 Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street Essex, Illinois 60935 i
Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515 Mr. H. G. Stanley Site Vice President Braidwood Station Commonwealth Edison Company RR 1, Box 84 Braceville, IL 60407 f
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i RE0 VEST FOR ADDITIONAL INFORMATION CREDIT 00R SOLUBLE BORON IN THE SPENT FUEL POOL
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COMMONWEALTH EDISON COMPANY 4
]
BYRON STATION. UNITS 1 AND 2. AND BRAIDWOOD STATION. UNITS 1 AND 2
]
DOCKET NOS. STN 50-454. STN 50-455. STN 50-456. AND STN 50-457 F
i 1)
Since the new analysis still requires a maximum reference fuel assembly k-infinity no greater than 1.470 to meet the integral fuel burnable 4
absorber (IFBA) requirements, why isn't k-infinity retained in technical specification (TS) 5.6.1.17 2)
Are new fuel assemblies immediately stored in the spent fuel pool upon i.
arrival onsite? If not, TS 5.6.1.2 for new fuel storage should be revised to require that k-eff in the new fuel storage racks remains less than or equal to 0.95 if fully flooded with unborated water and less i
than or equal to 0.98 if low-density optimum density is assumed.
j 3)
The boron concentration specified in TS 5.6.1.1.c should be the total soluble boron credit required to maintain k-eff less than or equal to
)
'/
0.95 without considering accidents (550 ppm). While the boron concentration of 2000 ppm in TS 3.9.11 is the starting point for the boron dilution analysis to show that dilution to 550 ppm is highly unlikely and the total soluble boron credit required with accidents s
(1650 ppm) is used to ascertain that the minimum boron concentration in j
the pool as required by TS 3.9.11 is sufficient to maintain k-eff no greater than 0.95 under accident conditions using double contingency, 1
based on the licensee's analysis, the appropriate value for TS 5.6.1.1.c is 550 ppm.
s j
4)
Reference to the " CRITICALITY ANALYSIS OF BYRON AND BRAIDWOOD STATION FUEL STORAGE RACKS" in TS 5.6.1.1.e, g, and h and in TS 6.9.1.10 is not l
appropriate. The TS should either refer to an approved report, including title, specific identifier (e.g., WCAP), revision and date; or the TS themselves should contain the appropriate parameters; number of required IFBA (5.6.1.1.e), applicable checkerboard configurations i
(5.6.1.1.g), interface requirements (5.6.1.1.h).
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ENCLOSURE
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