ML20155F854
| ML20155F854 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 07/24/1986 |
| From: | Rajender Auluck Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20151H280 | List: |
| References | |
| FOIA-88-198 NUDOCS 8810130402 | |
| Download: ML20155F854 (8) | |
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i 7590-01 UNITFD STATES NUCLEAR REGULATORY COMMISSION Y
BOSTON EDISON COMPANY DOCKET No. 50-203 ENVIRONMENTAL ASSESSMENT AND FINDINr, OF NO SIGNIFICANT IMPACT The U.S. Nuclear Regulatory Comission (the Connissioni is considering issuance of a schedular exemption from certain requirements of 10 CFR 50.48 to the Boston Edison Company (REco) (the licensee) for the Pilorim Nuclear Power Station, located at the licensee's site in Plymouth County, Massachusetts.
ENVIRONMENTAL ASSESSMENT Identification of the Prooosed Action The proposed action would grant a schedular exemption from reautrements of 10 CFR 50.48(c)(4) relating to the completion dates for modifications that RECo is makino to protect and enhance the plant's safe shutdown capabilities acainst the effects of fire.
These modifications primarily consist of separating redundant shutdown equipment by relocatino control panels and cables, relocating and addino sprinklers, emeroency lights and fire dampers, and adding torus water level and temperature instrumentation.
A 3-hour fire-rated door is also being added to the 4160-volt "A" switchgear
- room, l
The Need for the Proposed Action
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i 10 CFR 50.48(c)(4) requires, in part, that anv fire protection modifications needed to satisfy Section Ill.G.3 of Appendix 0 to 10 CFR Part 50, and reauir-1 ing plant shutdown in order to complete them, shall be implemented before startup after an unplanned outace that lasts for at least 120 days. Such an g ol g 2 000907 JOHNSUNDO-198 PDR
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7590-01 i l unplanned outage began at Pilgrim Station on April 12, 1986 when the plant was I
shut down for investication of leakage inside the residual heat removal (RHR1 system.
Several ot?,er equipment problems were also identified.
The necessary repairs were neerly complete when NRC notified RECo and other licensees of potential intergranular stress corrosion cracking of impeller wear rinos in the RHP oumps. Due to the importance of these cumps to safe operation and a need to leak test the containment isolation valves. BEco decided to inspect and, if necessary, repair the RHR pumps before restarting the plant.
These additional activities are expected to extend the outage until the end of f
August,1986, which is approximately 3 weeks more than the 120 days cited above.
Althouah the fire protection modifications of Pilgrim Station are about 85 percent complete, BECo states that the remainder cannot be conoleted by
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l Aucust 10, 1986. Hence, the need arises for an exemotion from the 120-day schedular requirement.
1 Environmental Impact of the Proposed Action i
The proposed action only affects the length of time allowed by i
10 CFR 50.48(c)(4) for completion of the required modificatinns. The licensee has proposed interim compensatory measures to provide the necessary i
level of fire protection uni.il the modifications are e.ompleted durino the comina refuelino outaae, as scheduled by REco and required by 10 CFR 50.48(c)(41. Thus, fire-related radiological releases will not i
differ from those detennined previously and the proposed exemption does not 1
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7500-01 3-otherwise affect facility radiological effluent or occupational exposures.
With reaard tn potential nonradiolooical impacts, the proposed exemption does not affect plant nonradiolonical effluents and has no other environmental impact. Therefore, the Comission concludes there are no measurable radiolooical or nonradiolooical environmental impacts associated with the l
proposed exemption.
Alternatives to the Propored Action:
Since the Comission has concluded there is no measurable environmental impact associated with the proposed exemption, other alternatives need not he evaluated. The principal alternative to the exemption would be to recuire rioid compliance with the 50.4Mel(4) requirements.
Such action would not c%ance the protection of the environment and would result in uniustified costs for the licensee.
Alternative Ute of Resources:
This action does not involve the use of resources not considered previously in the Final Environmental Statement related to the operation of Pilgrim Station.
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agencies and persons Consulted:
i The NRC staff reviewed the licensee's request and did not consult other agencies or persons.
FINDING 0F NO SIGNIFICANT IMPACT The Cnmission has detemined not to prep 3re an environmental impact i
statement for the proposed exemption.
Based upon the environmental assessment, the NRC staff concludes that the proposed tction will not have a significant effect on the quality of the human environment.
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7590-01
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For further details with respect to this proposed action, see the licensee's letters dated July 2,1986 and July 14, 1986. These letters are available for public inspection at the Comission's Public Document Room, i
1717 H Street, NW, Washington, D.C. and at the Plymouth Public Library, 11 North Street, Plymouth County, Massachusetts 02360.
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Dated at Bethesda, Maryland this 24th day of July 1986.
FOR THE NUCLEAP REGUt.ATORY COMMISSION N,W N%
Rajender Auluck, Acting Director BWR Project Directorate A1 Division of 8WR Licensing J
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7590-01 (JNITFD STATES Nt!CLEa0 #E4titATORY COWISSION t
POSTON EDISON COWDANY DOCKET No. 50-203 ENVIRONMENTAI. ASSESSMENT AND FINDINr. OF NO SIGNIFICANT IMPACT The IJ.S. Nuclear Degulatory Comission (the Cocynissioni is considering issuarce of a schedular exenntion from certain requirements of 10 CFR 50.48 te the Roston Edison Company (RECo) (the licenseel for the Pilorim Nuclear Power Station, located at the licensee's site in Plymouth County, Massachusetts.
FNV100NMFNTAI. aS9ESSWENT l
Identification of the Prooosed Action l
The proposed action would grant a schedular exemption from requirements of 10 CFR 50.48(c1(41 relatino to the comnbtion dates for modifications that RECn is maHne to protect art enhance the olant's safe shutdown capabilities ecainst the effects of fire.
These modifications crimarily consist of separating redundant shutdown equipment by relocatino control panels and cables, relocatino and addino sprinklers, emercency lights and fire danpers, and adding torus water level and temperature instrumentation. A 3-hour fire-rated door is also beina added to the 4160-volt "A" switchgear room.
The Need for the ProDosed Action 10 CFR 50.48(c)(4) requires, in part, that anv fire protection modifications needed to satisfy Section III.G.3 of Appendix 0 to 10 CFR Part 50, and requir-ing plant shutdown in order to complete them, shall be irnplemented before startuo.ifter an unplanned oJtace that lasts for at least 120 days.
Such an i
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7590-01 l
unplanned outage beoan at Pilgrim Station on April 12, 1986 when the plant was shut down for investication of leakage inside the residual heat removal IRHR1 Several other equipment problems were alsn identified.
system.
The necessary repairs were nearly complete when NRC notified RECo and other licensees of potential interpranular stress corrosion crackino of imoeller wear rinos in the RM pumps.
Due to the importance of these cumps to safe operation and a i
need to leak test the containment isolation valves, REco decided to inspect i
and, if necessary, revir the RHP pumps before restarting the plant.
l These additional activities are expected to extend the outage until the end of August,1986, which is approximately 3 weeks more than the 120 davs cited above.
Althouch the fire protection modifications of Pilgrim Station are about 85 oercent complete BFCo states that the remainder cannot be conoleted by Auuust 10, 1986.
Hence, the need arises for an exemotion from the 120-day t
schedular requirement.
Environmental Impact of the Procesed Action The proposed action only affects the length of time allowed by 10 CFR 50.48(c)(4) for completion of the required modificatinns.
i The licensee has proposed interim compensatory measures to provide the necessary level of fire protection until the modifications are completed durir.o the comino refuelino outace, as scheduled by RECo and required by 10 CFR 50.48(cif 41 Thus, fire-related radiological releases will not differ from those deterrined previously and the proposed exemption does not
7500-01 otherwise affect facility radiological effluent or occupational exposures.
With reeard to potential nonradiolonical impacts, the proposed exemption does not affect plant nonradiolonical effluents and has no other environmental
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impact. Therefore, the Comission concludes there are no measurable radiolooical or nonradiolooical environmental impacts associated with the proposed exenntion.
Alternatives to the Proposed Action:
Since the Comission has concluded there is no measurable environmental i
impact associated with the preposed exemotion, other alternatives need not he evaluated. The principal alternative to the exemption would be tn reouire I
rioid compliance with the 50.4McM4) requirements.
Such action would
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not enhance the protection of the environment and would result in un,iustified i
costs for the licensee.
Alternative Use of Resources:
This action does not involve the use of resources not considered previously in the Final Environrental Statement related to the operation of 1
Pilgrim Station.
Acencies and Persons Consulte,d,:
The NOC staff reviewed the licensee's request and did not consult other i
agencies or persons.
FIN 0!NG OF NO SIGNIFICANT fMPACT The Cornission has detervined not to prepare an environnental impact statement for the proposed exemption.
Based upon the environmental j
assessment, the NRC staff concludes that the proposed action will not have a significant effect on the Quality of the human environment.
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7590 01
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For further details with respect to this proposed action, see the licensee's letters dated July 2,1986 and July 14, 1986. These letters are l
available for public inspection at the Comission's Public Document Room, 1717 H Street, NW, Washington, D.C. and at the Plymouth Public Library, i
11 North Street, Plyrouth County, Massachusetts 02360.
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Dated at Bethesda, Maryland this 24th day of July 1086 j
FOR THE NifCLFAP Remit.ATORY COWISSION hW hNkA Raiender Auluck, Acting Director 9WR Pro,iect Directorate #1 Division of RWR l.icensing
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