ML17319A494
| ML17319A494 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/18/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17319A493 | List: |
| References | |
| NUDOCS 8007170431 | |
| Download: ML17319A494 (11) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 INDIANA AND MICHIGAN ELECTRIC COMPANY DOCKET NO.
50-316 DONALD C.
COOK NUCLEAR PLANT UNIT NO.
2 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No-21 License No. DPR-74 1 ~
The Nuclear Regulatory Comnission (the Commission) has found that:
A.
The application for amendment by Indiana and tlichigan Electric Company (the licensee) dated August 9, 1979, as supplemented December 7, 1979, March 28, 1980 and May 23, 1980, complies with the standards and requirements of the Atomic Energy Act
'f
- 1954, as amended (the Act) and the Comission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the COIImission; C.
There is reasonable assurance (i ) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the ComIission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating License No. DPR-74 is hereby amended to read as follows:
(2)
Technical S ecifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No.
21
, are hereby incorporated in the license.
The licensee shall operate the faci lity in accordance with the Technical Specifications.
3.
This license amendment is effective as of the date of its issuance.
FOR THE NUCLEAR REGULATORY COMMISSION
Attachment:
Changes to the Technical Specifications Dat'e of Issuance:
June 18, 1980 Operating Reactor ranch 41 Division of Licensing
ATTACHMENT TO LICENSE NENDiMENTS AMENDMENT NO.
21 TO FACILITY OPERATING LICENSE NO.
DPR-74 DOCKET NO. 50-316 Revise Appendix A as follows:
Remove Pa es 3/4 7-5 Insert Pa es 3/4 7-5
'PLANT SYSTEMS AUXILIARY FEEOWATER 'SYSTEM LIMITINt;CONDITION:.FOR OPERATION"::
3.7.1.2 At least three steam generator auxiliary feedwater pumps and associated flow paths shall be OPERABLE with:
a.
Two feedwater
- pumps, each capable of being powered from separate emeraency
- busses, and b.
One feedwater pump capable of beinq powered from an OPERABLE steam supply system.
APPLICABILITY:
MODES 1, 2 and 3.
ACTION:
With one auxiliary feedwater pump inoperable, restore at least three auxiliary feedwater pumps (two capable of beina powered from separate emergency busses and one capable of beina powered by an OPERABLE steam supply svstem) to OPERABLE sta.us within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in HOT SHUTDOHN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
SURVEILLANCE REQUIREMENTS..
4.7.1.2 Each auxiliary feedwater pump shall be demonstrated OPERABLE:
a.
At least once per 31 days by:
Verifying that each motor driven pump develops a discharae pressure
> 1375 psia on recirculation flow.
2 ~
3.
Verifying that the steam turbine driven pump develops a
discharqe pressuie nf > 1285 psig at a flow of > 700 arm when the secondary:steam suoplv'ressure'is"oeeater'an 310 ps>a.
The provisions of. Specification 4.0.4 are not applicable for entry into MODE 3.
/:-
Verifying that each valve (manual. power oper ated or automatic) in the flow path that is not locked, sealed,
'or otherwise secured in position, is in its correct position.
b.
At least once per 18 months by:
D. C."COOK-Verifying that each automatic valve in the flow path actuates to its correct position on a Safety Iigection test signal.
UNIT 2 Amendment No 21 3/4 7-5
PLANT SYSTEMS SURVEILLANCE RE UIREMENTS Continued 2.
Verifying that each motor driven pump starts automatically upon receipt of each of the following signals:
a)
Loss of main feedwater pumps.
b)
Safety Injection.
c)
Steam Generator Water LevelLow-Low from one, steam generator,
.2 out of 3 channels.
3.
Verifying that the steam turbine driven pump starts auto-matically upon receipt of each of the following signals:
a)'team Generator Mater Level Low-Low from two steam generators, 2 out of 3 channels.
b)
Reactor Coolant Pump Bus Undervoltage.
D. C.
COOK - UNIT 2 3/4 7-6
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0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO.
21 TO FACILITY OPERATING LICENSE NO.
DPR-74 INDIANA AND MICHIGAN ELECTRIC COMPANY DONALD C.
COOK NUCLEAR PLANT UNIT NO.
2 DOCKET NO. 50-316 Introduction By letter dated August 9, 1979, Indiana and Michigan Electric Company (the licensee) submitted proposed Technical Specification changes for the Donald C.
Cook Nuclear Plant, Unit Nos.
1 and 2.
The proposed changes would (1) add a motor dri ven auxiliary feedwater (AFW) pump to each unit to enhance the availability of Units 1
and 2 by eliminating shared equipment dependency, (2) add an additional DC battery system; and (3) eliminate dependency on alternating current in the turbine driven auxiliary feedwater train.
Our evaluation of items 2 and 3 above was completed and was discussed in the Safety Evaluation related to Amendment Ho.
35 to Facility Operating License Ho.
DPR-58 and Amendment No.
16 to Facility Operating License No.
DPR-74 dated December 20, 1979.
This safety evaluation report addresses only the addition of a motor driven auxiliary feedwater (AFW) pump to each unit (item
- 1) and the additional information provided by the licensee in response to our request regarding proposed ventilation systems for the new safety grade battery rooms.
Existin Auxiliar Feedwater S stem Arran ement The existing auxiliary feedwater system (AFWS)'onsists of a steam turbine driven pump in each unit which supplies auxiliary feedwater to all four steam generators of its associated unit and a motor driven pump in each unit which is shared between Unit No.
1 and Unit No. 2.
Each motor'driven pump supplies two steam generators in each unit (i.e., the Unit No.
1 motor driven pump supplies steam generators No.
2 and Ho.
3 of Unit No.
1 and steam generators No.
1 and No.
4 of Unit No. 2, and the Unit Ho.
2 motor driven pump supplies steam generators No.
2 and Ho.
3 of Unit No.
2 and steam generators No.
1 and No.
4 of Unit No. 1).
Each of the motor driven pump discharge lines to the steam generators has a normally closed motor-operated valve for flow control and isolation.
The turbine driven and motor driven auxiliary feedwater pumps of each unit (although each motor driven pump supplies both units) normally take suction from the condensate storage tank associated with that unit.
The motor driven pumps in each unit are powered by a 500 HP motor fed from the 4 kV auxiliary bus TllD (T21D - Unit 2).
The motor is fed from the Train CD safety bus in each unit.
Each of the motor driven pumps discharge lines to the steam generators has a normally closed motor operated valve (MOV) for flow control and isolation.
The motor is started in sequence with other safety related loads in the event of a station blackout or a
blackout coincident with safety injection following energization of the safety bus from the Train CD diesel generator, The running loads on the diesel generators does not exceed its continuous rating.
Descri tion of Desi n Modification The licensee, in Amendment No.
84 and subsequently by letter dated December 7,
1979 and May 23,
- 1980, proposed that an additional motor driven auxiliary feedwater pump be added to each unit.
The two dri ven pumps in each unit will have the same flow capacity and as described below will be powered from separate essential power supplies.
The turbine driven pump will continue to supply auxiliary feedwater to all four steam generators, and each of the two motor driven pumps will be connected to two steam generators in the associated unit.
The cross connected discharge lines between the existing motor driven pumps and the auxiliary feedwater supply lines to the steam generators in the opposite unit will be retained to provide manual backup capability.
These two cross-connected lines will be isolated by a locked-closed, manual valve in each line.
In addition, administrative controls and procedures will be implemented to maintain the cross-connected lines isolated to govern their use if a condition arose where auxiliary feedwater from the opposite unit were required.
P The scheme of water supplies to the auxiliary feedwater pumps will basically remain unchanged with the condensate storage tanks and auxiliary feedwater pump suctions of the two units.
The auxiliary feedwater pumps are housed in adjacent, missile protected enclosures.
The new additional motor driven pump will be powered from the 4 kV auxiliary bus T11A (T21A - Unit 2), i.e., the Train AB safety bus in each unit.
The addition of the motor driven pump in each unit will make the Train AAB and Train CD safety bus loads identical to each other.
The additional motor, was included in the original design base for the Train AB safety buses and the diesel engine load resulting from automatic starting and loading of all safety loads does not exceed the continuous rating of the diesel generator.
The present Unit 2 motor driven auxiliary feedwater pump was temporarily connected to the Train AB safety bus of Unit 1 during the initial operation of Unit 1 prior to startup of Unit 2.
The new motor driven pump will be connected in the same manner.
By eliminating the cross unit dependence on the auxiliary feedwater
- systems, the electrical train orientation of the discharge valving of the pumps has been arranged such that one motor driven pump supplies water to two steam generators in the same unit as the pump.
As a result of this arrange-ment, the power feeds to some of the MOVs have been changed.
The ventilation fan motors for the enclosures for the existing MDAFP have not been changed and are powered from 600 V bus llD in Unit 1 and bus 21D in Unit 2.
The ventilation fan motors for the new feed pump enclosures are powered from 600 Y bus llA in Unit 1 and bus 21A in Unit 2.
The electrical cables installed as a result of the addition of the MDAFP and the modifications to the existing equipment meet Regulatory Guide 1.75.
The proposed ventilation systems for both of the new safety grade battery rooms are designed to maintain hydrogen concentration well below two volume percent.
The design is Seismic Category I and AMCA Group C construction.
Redundant exhaust fans are provided in the new battery room of each unit.
Indications and alarms supervising the battery room exhaust fans are provided in the new battery room of each unit.
Indi cations and alarms supervi sing the battery rooms exhaust fans are provided in the control room.
Evaluation We have reviewed the information provided by the licensee concerni ng the additional motor driven pump in each unit and the ventilation systems for the new battery rooms.
The proposed AFW system modification, with an added motor dri ven pump in each unit will eliminate the shared operation of the motor driven pumps between the two units.
The modified AFW system will provide three indi vidual AFW pump trains for each unit.
We have reviewed
the PEIDs, Figure 10.5-1 of Amendment Ho. 84, and find that the modified AFW system arrangement will increase the system reliability.
The two motor driven pumps are located inside individual missile protected enclosures.
With a three-pump train in each unit, the auxiliary feedwater flow is available, assuming a postulated high energy line break plus a single active failure anywhere in the system, and therefore, the new system meets the requirements of Branch Technical Position ASB 10-1 ~
In response to our request for additional information regarding the electric power supplies to the new battery room ventilation systems, the licensee by letter dated triarch 28, 1980, indicated that the redundant ventilation systems for the battery rooms are supplied from separate essential buses.
The redundant ventilation systems for the battery rooms are powered by AC sources.
At our request the licensee verified that the hydrogen con-centration and temperature inside the battery rooms will be maintained within allowable limits for at least two hours following loss'of both offsite and onsite AC power, because the D.
C.
Cook plant batteries will produce negligible amounts of, hydrogen and heat during battery use.
Thus there will be no buildup of hydrogen or any temperature increase in the event of AC power failure.
We agree that the batteries will not generate significant amounts of hydrogen and heat energy to affect the battery room environmental conditions within two hours following loss of both offsite and onsite AC power.
The licensee indicated that the proposed ventilation systems for both of the new safety related battery rooms are designed to Seismic Category I ~
At our request the licensee also verified that the quality classification of the ventilation system is not lower than the quality of existing safety related ventilation systems in the D. C.
Cook plant.
We also reviewed the information provided by the licensee concerning the electrical changes associated with the addition of a motor driven auxiliary feedwater pump in each unit and the ventilation fan motor used for motor driven pump enclosures.
In addition we reviewed the effect of the additional load of 500 HP on the Diesel Generator, the 4 kV auxiliary bus and its associated switchgear.
The proposed Auxiliary Feedhvater Systems modification, with the addition of MDAFP in each unit will eliminate the shared operation of the motor driven pumps between the two units.
The modified auxiliary feedwater system will provide three individual auxiliary feedwater pump trains for each unit.
We have reviewed the electrical dwgs 1-1200A-20, 1-98214-17, 1-98217-6 and 1-98218-1 and find that the modified auxiliary feedwater system arrange-ment for each unit, the two motor driven auxiliary feedwater
- pumps, and their associated valves are powered from separate emergency power supplies.
This is in conformance with IEEE Standard 308 and IEEE Standard 384 which are endorsed by Regulatory Guide 1.32 and 1.75, respectively.
Technical S ecifications The licensee proposed Technical Specification changes that deleted the footnote in the Unit 2 Technical Specifications that the motor driven auxiliary feedwater pumps (NDAFPs) are shared with Unit Ho.
1 including the surveillance requirements for the HDAFPs.
The Technical Specifications for Unit 1 do not require any changes.
The limiting condition for operation for Unit 2 calls for action that "with one auxiliary feedwater pump inoper-able, restore at least three auxi liary feedwater pumps (two capable of being powered from separate emergency buses and one capable of being powered by an operable steam supply system) to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />."
This is consistent with the Standard Technical Specifications, and, therefore, acceptable.
Conclusion Based on our review of the modifications proposed to the auxiliary feedwater
- system, we have concluded that:
(1)
The modified three train AFW system arrangement provides increased system rel iability.
(2)
The modified three train AFW system in each unit eliminates the shared operation of the system between two units.
(3)
The modified three train AFW system will ensure AFW flow availability during a postulated high energy line break plus a single active failure condition.
Thus, the new AFW system meets requirements of Branch Technical Position ASB 10-1.
(4)
The electrical modifications are in conformance with IEEE Standard 308 and IEEE Standard 3.84 which are endorsed by Regulatory Guides 1.32 and 1.75, respectively.
(5)
The proposed Technical Specifications are consistent with the Standard Techni ca 1 Speci fications.
We, therefore, conclude that the proposed Auxiliary Feedwater system modifications and the proposed Unit Ho.
2 Technical Specification changes are acceptable.
Environmental Consideration We have determined that the amendments do not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact.
Having made this determination, we have further concluded tnat the amendm nts involve an action which is insignificant from the standpoint of environmental impact
- and, pursuant to 10 CFR $ 51. 5(d)(4), that an environmental impact statement or negative declaration and environ-mental impact appraisal need not be prepared in connection with the issuance of these amendments.
Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendments do not involve a significant increase in the probability or consequences of accidents previously considered and do not involve a significant decrease in a safety margin, the amendments do not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed
- manner, and (3) such activities will be conducted in compliance with the Coramssion's regulations and the issuance of these amendments will not be inimical to the common defense and security or to the health and safety of the public.
Date:
June 18, 1980