ML18051A948
| ML18051A948 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/26/1984 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| LSO5-84-06-038, LSO5-84-6-38, NUDOCS 8406290006 | |
| Download: ML18051A948 (5) | |
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Doik~t No.;
50~255 LS05-84..:0.6-038.
Mr. David J. VandeWalle *
- Nuclear Licensing Administrator
- Consumers Powe~. Company 1945 West Parnall Road
. Jack~o~, Michig~n ~49201
Dear Mr *. VandeWalle:
June 26, 1984
SUBJECT:
_DECAY HEAT..REMOVAL CAPABlL.ITY ;... MULTI PLANT ACTIO~ NUMBER B-57.
Re:
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The.NRC'staff has *reviewed the.Palisades. T.echn_ical-_Speci(icatfons with r~gard to decay heat removal capability and*find*.that we' need additiona_l information
- " to complete our review~. Please* provide a r~.sponse. to* th.e enclosed request for ad~itiona_l information within 45'. days of *r*eceipt of this letter*~.*
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Mr. David J. Vandewalle cc M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200
,One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 James G. Keppler, Regional Administrator Nuclear Regulatory Commission, Region Ill 799 Roosevelt Road Glen Ellyn, Illinois 60137 Township Supervisor Covert Townshi Route 1, Box 10 Van Buren County, Michigan 49043 Office of the Governor (2)
Room l - Capitol Building Lansing, Michigan 48913 Palisades Plant ATTN:
Mr. Robert Montross Plant Manager Covett, Michigan 49043 U. S. Environmental Protection Agency Federal Activities Branch Region V Office ATTN:
Regional Radiation Representative 230 South Dearborn Street Chicago, Illinois 60604 Resident Inspector c/o U. S. NRC Palisades Plant Route 2, P. O. Box 155 Covert, Michigan 49043 June 26, 1984 Lee E. Jager, P.E., Chief Environmental and O~cupational Health Services Administration Michigan Department of Public Health 3500 N. Logan Street Post Office Box 30035 Lansing, Michigan 48909
REQUEST FOR ADDITIONAL INFORMATION PALISADES NUCLEAR POWER PLANT
- 1.
For startup and power operation (Modes 1&2) the Standard Technical Specifications (STS) require both RC loops and both RC pumps in each loop to be operating. The Palisades Technical Specifications (TS) have a similar requirement.
The ST~ also require verification of RC pump and RC loop operation on a 12-hour basis, and with less than the above required RC pumps in operation the plant should be in the hot standby mode within one hour.
The intent of the STS requirement is to assure the RC pumps and other supporting equ-ip~nt are monitored to detect degrading performance.
Palisades TS do not have the surveillance require-ment and permit 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> operation.to restore the inoperable pump(s) before the reactor is to be in the hot standby mode.
The technical justifica'tion for Pa.lisades not meeting the STS requirement is not clear to the staff. Provide justification tp demonstrate why the surveillance requirement is not necessary or propose modifications to your TS consistent with the STS.
Also justify permitting 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of operation, rather than one hour permitted in the STS, before the reactor is to be in the hot standby mode, or propose suitable modifications to your TS.
- 2.
For hot standby operation, the STS require that two reactor coolant loops shall be operable, including the SG and at least one cssociated RC pump in each loop, and that at least one of the RC loops is operating.
If these conditions are not met and corrective actions cannot restore both loops to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, the reactor is to 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 />.
Boron dilution operations are to be stopped if an RC loop is not operating.
The STS also require verification that at least one RC pump is operable once per seven days and at least one RC loop is in operation at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
The Palisades TS require both steam generators to be operable during this
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mode of operation.
When RCS boron concentration is being diluted, the TS require that at least one RC pump be operating, otherwise there is no requirement on the RC pump operability. The TS also do not have any surveillance requirements or action items comparable to the STS items for this mode of operation.
It is not clear how Palisades TS requirements would satisfy the intent of the STS limiting condition for hot standby.
Provide discussions of how the existing TS meet the intent of the STS for a redundant means of decay heat removal and how the existing TS meet the intent of the STS's surveillance requirements and action items for hot standby mode.
Alternately, propose new technical specifications to meet the intent of the STS.
- 3. --fhe -STS for the hot shutdown mode require at least two loops that are capable of removing decay heat to be operable.
Either two reactor coolant loops (including the associated steam generators) and at least one associated RC pump per loop or the two RHR loops or one loop of each type must be operable.
The STS also require one of the above loops to be operating.
If these conditions are not met and immediate corrective actions cannot restore the required loops to operable status, the reactor is to be in the cold shutdown mode within 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br />.
Boron dilution operations are to be stopped if an RC loop is not operating.
In addition, the STS require that the RC pump's operability be verified once per seven days, and at least one coolant loop shall be verified to be operating once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
For the cold shutdown mode, the STS require that two RHR loops be operable and at least one loop to be operating. Otherwise, immediate action must be taken to restore the required loops to operable status as soon as possible. The STS also require that boron dilution operations be suspended if no RHR loop is operating, and that RHR loop operation should be verified once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
The Palisades TS only require both steam generator:s-to be operable in mode 4; no coolant loops are required to be operating.
For both modes, the TS also require that at least one RC pump or one shutdown cooling pump be operating but only wh~n the RCS boron concentration is being changed.
The RHR heat exchangers are not required to* be operable when using a shutdown cooling pump.
The TS also do not contain any surveill~
ance requirements meeting the intent of the STS limiting condition.
Provide a discussion or justification of how the existing TS meet the STS intent for a redundant means of decay heat removal for both modes 4 and 5.
Also discuss how the existing TS meet the intent of the STS surveillance requirement for both modes.
Otherwise, propose new technical specifications to meet the intent of the STS.
- 4.
For refueling operation (mode 6), the STS require that at least one RHR
. loop be operating.
If the water l~vel above the top of the reactor vessel flange is more than 23 ft., the STS require that one RHR loop be operable and in operation.
If the RHR loop cannot be made operable, the STS require that all refueling operations be suspended, all *boron dilution operations are prohibited, and containment penetrations providing direct access to the environment must be isolated within four hours. Also, at least one shutdown coolant loop shall be verified to be in operation once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
If the water level above the top of the reactor vessel flange is less than 23 ft., the STS require that two RHR loops be operable, with one in operation.
With less than required* shutdown cooling loops operable, the STS require the operator to immediately initiate corrective action to return the required loops to operable status.
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.. -T-he Palisades TS require at least one shutdown coolant loop to be in operation for refueling mode.
There are no verification requirementson the operating shutdown cooling loop, or the operable status of both shutdown cooling loops.
The TS also do not specify the water level above the top of the reactor vessel flange and the appropriate equipment and actions required.
Provide justification or alternative means to assure that the STS intent for a redµndant means of decay heat removal can be met.
Also provide a discussion why the action items surveillance requirements and the specific wate~-leval above the top of the reactor vessel flange and the appropriate equipment and actions required by STS are not necessary. Alternately propose new technical specifications meeting the STS requirements.
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