ML17328A649
| ML17328A649 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 04/09/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17328A648 | List: |
| References | |
| NUDOCS 9004170244 | |
| Download: ML17328A649 (4) | |
Text
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e UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO.
TO FACILITY OPERATING LICENSE NO.
DPR-58 AND AMENDMENT NO.
0 TO FACILITY OPERATING LICENSE NO.
DPR-74 INDIANA MICHIGAN POWER COMPANY
'ONALD C.
COOK NUCLEAR PLANT UNIT NOS.
1 AND 2 DOCKET NOS ~ 50-315 AND 50-316
- 1. 0 INTRODUCTION By letter dated January 12, 1989, the Indiana Michigan Power Company (IMPC) submitted a license amendment application that would modify Technical Specification (TS) Table 3.3-3 (Engineered Safety Features Actuation System Instrumentation) so that it more accurately reflects the actuation signals for the auxiliary feedwater (AFW) system.
- 2. 0 DISCUSSION Each D.
C.
Cook Unit employs two 50% capacity motor-driven auxiliary feedwater (MDAFW) pumps and one 100% capacity turbine-driven auxiliary feedwater (TDAFW) pump.
In each unit, the Train A (East)
MDAFW pump supplies the No.
2 steam generator (SG) through motor operated valve FMO-222 and the No.
3 SG through FMO-232.
The Train B (West)
MDAFW pump supplies the No.
1 SG through FMO-212 and the No.
4 SG through FHO-242.
This design is illustrated in Figure l.
As shown in Figure 2, the emergency power source for the Train A MDAFW pump is 4KV bus T11D.
Bus T11D supplies 600V bus 11D (via a 4KV/600V transformer) which provides power to the Train A motor operated valves (FHO 222 and 232).
- Likewise, bus TllA, the emergency power source for the Train B HDAFW pump, supplies 600V bus llA which provides power to the Train B motor operated valves (FMO 212 and 242).
Each of the 4KV emergency busses have three loss of voltage relays.
Actuation of,two out of the three relays on bus T11A wi 11 result in auto-start of the Train B
Similarly, actuation of any two relays on Bus T11D will start the Train A EDG and MDAFW pump.
A loss of voltage condition (2 out of 3) on both safety busses associated with a given train (e.g., TllC and T11D for Train A) will cause motor operated valves in both trains to open, if they are closed.
9004i70244 900409 PDR ADOCK 050003i5 P
In their license amendment application, IMPC proposed the following changes to improve the clarity and accuracy of TS Table 3.3-3:
TS Table 3.3-3, Item G.b (4KV Bus loss of voltage for the MDAFW Pumps) currently lists the total no. of channels as "2/Bus."
As discussed earlier this should read "3/Bus."
"Valve Actuation" and "Pump start" are added under "4KV loss of voltage."
The number of channels to trip for pump start is specified as 2/bus on TllA (Train 8) or TllD (Train A).
The number of channels to trip for valve actuation is specified as 2/bus on T11A 8 TllB or TllC 8 TllD.
- 3. 0 EVALUATION The changes described in Section 2 are purely editorial.
The changes improve existing TS Table 3.3-3 by correctly specifying the number of loss of voltage channels per bus and by clarifying that both busses of a particular train must indicate a loss of voltage to result in the opening of the motor operated valves that supply flow from the MDAFW pumps.
The staff has determined that the changes proposed by the licensee are acceptable.
- 4. 0 ENVIRONMENTAL CONSIDERATION These amendments involve a change in a requirement with respect to the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and a change in a surveillance requirement.
We have determined that the amendments involve no significant increase in the
- amounts, and no significant change in the types, of any effluents that may be released offsite, and'hat there is no significant increase in individual or cumulative occupational radiation exposure.
The Commission has previously issued a proposed finding that these amendments involve no significant hazards consideration and there has been no public comment on such finding.
Accordingly, these amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b),
no environmental impact statement or environmental assessment need be prepared in connection with the issuance of these amendment.
5.0 CONCLUSION
We have concluded, based on the considerations discussed above, that (1) there is reasonable assurance that the health and safety of the public will not be endangered'by operation in the proposed
- manner, (2) such activities will be conducted in compliance with the Commission s regulations, and (3) the issuance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Date:
April 9, 1990 Principal Contributor:
J. Giitter
STEAM GENERATOR NO. 4 STEAM GENERATOR NO. 3 STEAM GENERATOR NO.
1 STEAM GENERATOR NO. 2 FMO 242 M
FMO 212 M
FMO 231 M
FMO 221 M
FMO 222 M
FMO 232 M
EMERGENCY LEAK-OFF TO CONDENSATE STORAGE TANK EMERGENCY LEAK-OFF TO CONDENSATE STORAGE TANK EMERGENCY LEAK-OFF TO CONDENSATE STORAGE TANK WEST MOTOR DRIVEN A.F.P.
CONDENSATE STORAGE TANK TRAIN B
TURBINE DRIVEN A.F.P.
N TRAIN DC CONTROL POWER EAST MOTOR DRIVEN A.F.P.
TRAIN A
Figure 1
Donald C. Cook Nuclear Plant auxiliary feedrvater system
T11A 4KV BUSSES T11B T11C T11D MOTE%
DRIVEN'FW PUMP TRAINB DIESEL GEN.
1AB DIESEL GEN.
1CD MOTOR DRIVEN AFW PUMP TRAINA TRANSFORMER 11A TRANSFORMER 1tD 800V BUS 11A 60QV BUS 1 1 D VALVES FMO 212 8 242 VALVES FMO 222 &
232 TRAIN 8 TRAIN A Flexure 2 iiower Iourcel for motor driven auxiliary feedwater pumps and associated valves