ML20003B915
| ML20003B915 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/05/1981 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Crouse R TOLEDO EDISON CO. |
| References | |
| NUDOCS 8102260119 | |
| Download: ML20003B915 (4) | |
Text
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o UNITED STATES
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,,,i NUCLEAR REGULATORY COMMISSION WASHINGTON D. C. 20555
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February 5, 1981
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Docket No. 50-346 g
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'F' Mr. Richard P. Crouse Vice President, Nuclear 2
IED11193lu{B Toledo Edison Company
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Edison Plaza "wss on Cf
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V 300 Madison Avenue Toledo, Ohio 43652 9
Dear Mr. Crouse:
In our continuing review of bypass and reset capabilities of engineered safety features at Davis-Besse, we have identified additional information needed to complete this review. This information is identified in the enclosure. This request is based up;n the information provided in your submittal dated July 23, 1980, on this subject. Your are requested to respond within 45 days of receipt of this letter.
Sincerely, n. -l t li/
-e Robert W. Reid, Chief Operating Reactors Branch d4 Division of Licensing
Enclosure:
Request for Additional Information cc: See next page j
8102 20o' l'
Toledo Edison Company cc w/ enclosure (s):
Mr. Donald H. Hauser, Esq.
U.S. Nuclear Regulatory Commission The Cleveland Electric Resident Inspector's Office Illuminating Company 5503 N. State Route 2 P. O. Box 5000 Oak Harbor, Ohio 43449 Cleveland, Ohio 44101 Director, Criteria and Standards Gerald Charnoff, Esq.
Division Shaw, Pittman, Potts Office of Radiation Programs (ANR-450) and Trowbridge U. S. Environmental Protection Agency 1800 M Street, N.W.
Washington, D. C.
20460 Washington, D. C.
20036 Leslie Henry, Esq.
Fuller, Seney, Henry and Hodge U. S. Environmental Protection Agency 300 Madison Avenue Federal Activities Branch Toledo, Ohio 43604 Region V Office ATTN: EIS C0ORDINATOR Mr. Robert B. Borsum 230 South Dearborn Stract Babcock & Wilcox Chicago, Illinois 60604 Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Ida Rupp Public Library Ohio Department of Health 310 Madison Street ATTN: Director of Health Port Clinton, Ohio 43452 450 East Town Street Columbus, Ohio 43216 President, Board of County Commissioners of Ottawa County Port Clinton, Ohio 43452 Attorney General Department of Attorney General 30 East Broad Street.
Columbus, Ohio 43215 Harold Kahn, Staff Scientist Power Siting Commission 361 East Broad Street Columbus, Ohio 43216 Mr. Rick Jagger Industrial Commission State of Ohio 2323 West 5th Avenue Columbus, Ohio 43216 Mr. Ted.Myers Manager, Nuclear Licensing Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, Ohio 43652
REQUEST FOR ADDITIONAL INFORMATION BYPASS AND RESET CAPABILITIES OF ENGINEERED SAFETY FEATURES DAVIS-BESSE, UNIT NO. 1 INTRODUCTION The information provided in your letter of July 23, 1980 (from R. P.
Crouse, Toledo Edison Co., to T.. M. Novak, NRC) in response to the NRC letter dated June 24, 1980 (from R. W. Reid, NRC, to R. P. Crouse) has been reviewed and found to be insufficient to determine whether system performance is in 8
compliance with NRC criteria that apply to systems for actuating containment
. ventilation / purge valves. The criteria are intended to assure that automatic closure of the valves is not prevented by manual overriding or blocking of the safety actuation signals.
The concerns and the minimum additional information needed to resolve the concerns are identified herein. You are requested to supply the information indicated and any additional information that may be necessary to permit resolution of the concerns.
Item 1.
CONCERN - In the documents submitted for review, inconsistencies were observed in the assignment of safety actuation (SA) signals to output modules 121 and 122; because of these inconsistencies, compliance with the six evaluation criteria cannot be established at this time.
In the July 23, 1980 letter, the response to Item 2:(1) indicated that a tabulation of all devices operated by Safety Feature Actuation Signals (SF7S) was provided in Figures 7-5A through F l
of the FSAR.
The response to Item 2 (3) indicated that the internal circuit i
' drawings for these systems were provided in Drawings S9N16-1,
-2,
-3, and 4 as an attachment to the FSAR. Review of these documents revealed inconsistencies in the tabulation of signal assignments in Figure 7-5A and those shown on
~
Drawings S9N16-1 and S9N16-2. Signals that have inconsistent descriptions are identified by circles in the following tables. The inconsistencies observed are identified in the following table.
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OUTPUT MODULE 121 Signal Assignment in Fig. 7-5A Assignment in Dwg. S9N16-1 Sh 2 PURGE EXHAUST FAN C-3 9A SPARE CTMT PURGE OUT ISO VLV (V5008)
PURGE OUTLET VLV (V5008)
C CTMT AIR SAMPLE ISO VLV (V50llA)
CONT AIR SAMPLE VLV (V5011A)
(V50llB)
(V50llB)
D (V50 llc)
(V5011C)
E (V50llD)
(V50llD)
F G
PURGE INLET (V5006)
MECH PENT RM 4 PURGE VLV (V5009)
PEN ROOM $3 (V5021)
MECH PENT RM 4 PURGE VLV (V5016)
PEN ROOM $4 (V5016)
CTMT AIR SAMPLE RET ISO VLV (V50llE)
SPARE J
K SPARE (NO LABEL) h CTRM RET FAN & HVAC UNIT 1 (S10-1)
(NO LABEL)
OUTPUT MODULE 122 Signal Assignment in Fig. 7-5A Assig nment in Dwg. 59N16-2 Sh 2 PURGE SUP FAN C-2 9A SPARE CTMT AIR SAMPLE ISO VLV (V50100)
CONT AIR SAMPLE ISO VLV (V5010D)
C MECH PENT RM 3 PURGE VLV (V5004)
EAST 585 PENT ROOM ISO VLV (V5004) h MECH PENT RM 3 PURGE VLV (V5021)
WEST 585 PENT ROOM ISO VLV (V5009)
E CTMT PURGE IN ISO VLV (V5005)
PURGE IN ISOL VLV (V5005)
F CTMT PURGE OUT ISO VLV (V5007)
PURGE OUT ISOL VLV (V5007)
(V5010A)
CONT AIR SAMPLE ISOL VLV (V5010A)
(V5010B)
(V50108)
(V5010C)
H (V5010C)
I (V5010E)
SPARE 9J (NO LABEL)
SPARE h
CTRM RET FAN & HVAC UNIT 2 (slo-2)
(NO LABEL)
REQUEST - Please provide the correct SA signal assignments for output modules 121 and 122.
Item 2.
CONCERN - The inconsistencies discussed in Item 1 have raised the concern that other dccuments submitted for review may not provide an accurate, up-to-date description of the system circuits as now installed and operating.
REQUEST - You are requested to review the information previously submitted for this evaluation and, where necessary, submit an updated ?f.st of SFAS equipment
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and corrected schematic diagrams.
I t.i
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