ML20080F847
| ML20080F847 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 09/12/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-563, NUDOCS 8309190421 | |
| Download: ML20080F847 (5) | |
Text
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4 SEAaROOK STA110N
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1671 Worcesser Road hominoham, Massachveens 01701 I
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Put2c Service of New Hampshire September 12, 1983 SBN-563 T.F. B7.1.2 l
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United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter SBN-236, dated March 12, 1982, " Responses to 430 Series RAIs", J. DeVincentis to F. J. Miraglia
Subject:
RAI 430.14 Revision
Dear Sir:
Reference (b) transmitted our response to RA1 430.14, which described how the Seabrook design met the requirements of Branch Technical Position PSB-1.
In RAI 430.14, we made the following commitments in order to satisfy Position 2 of the BTP:
"The Technical Specifications will include a test requirement to demonstrate the operability of the automatic bypass and reinstatement features at least once per 18 months during shutdown.
l The load shed circuitry will be modified to include the capability to monitor the status of the load shed circuitry."
At the time that our original response was written, we had misinterpreted the intent of BTP Position 2 in assumlag that continuous monitoring of the status of load shed circuitry was required. We now realize that the only requirement is the verification of operability at least once per 18 months i
during shutdown. This verification can be performed with no modification to the circuitry. We a re, therefore, modifying our response to RAI 430.14 to
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T'DR 1000 Elm bt.. P.O. Box 330. Monchester. NH O3105 Telephone (603) 669-4000 'WX 7102207595
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' United States Nuclear Regulatory Commission September 12, 1983 Attention:
Mr. G. W. Knighton, Chief Page 1 delete our commitment to modify the load shed circuitry to include the capability to monitor the status of load shed circuitry. The Technical Specification requirement will remain unchanged.
A revised RAI 430.14 is enclosed.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY John DeVincentis Project Manager JDV/bt Enclosure cca Atomic Safety and Licensing Board Committee i
l
430.14 Describe how the Seabrook design meets Branch Technical Position PSB-1, Adequacy of Station Electric Distribution System Voltages.
RESPONSE
The following discussion describes how the design of Seabrook Station meets the requirements of Branch Technical Position PSB-1.
The item numbers correspond to the positions of the Branch Technical Position.
(1) A second level undervoltage protection system is provided.
This system is described in FSAR Section 8.3.1.1.b.4.b and in the response to RAI 430.15.
(2) The Seabrook Station design meets Position 2 of Branch Technical Position PSB-1.
The bypass of the load shedding feature during sequencing, and its restoration in the event of a subsequent diesel generator breaker trip is discussed in FSAR Section 8.3.1.1.e.6.
In addition, the load shed feature is reinstated af ter load sequencer action when the operator resets the sequencer override pushbutton. This action permits the operator to re-assume control of diesel generator loading.
The Technical Specifications will include a test requirement to demonstrate the operability of the automatic bypass and reinstatement features at least once per 18 months during shutdown.
Th: 1eed e'ed ri-~ ftry cill 5: _;dified ;. i.,ml.J. ;;m rep 2b!11ty te r rit:r th: ;te;.e vi inc Lyp.. uliculu.y.
(3) The design of Seabrook Station meets the requirements of Position 3.
The response to RAI 430.5 contains the complete analysis required by Position 3.
(4) The analytical techniques and assumptions used in the voltage analysis cited in Item 3 above will be verified by actual measurement as part of the pre-operational test program. The guidelines of Position 4 of Branch Technical Position PSB-1 will be followed and good correlation between the analytical results and the test results will be demonstrated.
Seabrook Station's commitment to perform this testing is also described in FSAR Section 14.2.6.
This section describes Seabrook Station's 1,nterpretation of Appendix A, Section 1.g I
of Regulatory Culde 1.68.
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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) a)
Verifying de-energization of the emergency buses and load shedding from the emergency buses.
b)
Verifying the diesel starts from ambient condition on the auto-start signal, energizes the emergency buses and the permanently connected loads, energizes the auto-connected emergency loads through the emergency power j
sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After loading, the voltage and frequency of the emergency buses shall be maintained at 4160 volts +2%
and 60 Hz +2% during the test.
c)
Verifying that all automatic diesel generator trips j
except engine overspeed, low lube oil pressure, 4160 volts bus fault and generator differential, are automatically bypassed upon loss of voltage on the emergency bus concurrent with a safety injection actuation signal.
d)
Verifying that the permanently connected and auto-connected loads to e'ach diesel generator do not exceed the short time rating of 6697 kW.
2.
Verifying that the diesel generator operates for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of the test, the diesel generator shall be loaded at 6697 kW, the short time rating, and during the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 6083 kW, the continuous racing. The test should also verify that the cooling system functions within design limits.
J 3.
Verifying the capability to reject a load nf greater than or equal to the largest single load, (later) kW, while maintaining voltage within 4160 volts + 10%, - 2% and without exceeding 75% of the difference between nominal speed and the overspeed trip setpoint.
4.
Verifying the diesel generator capability to reject full load without reaching-the overspeed trip setpoint.
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- William S. Jardin, III, Esquire Brentwood Board of Selectmen Harmon & Weiss RED Dalton Road 1725 I Street, N.W. Suite 506 Brentwood, New Hampshire 03833 i
Washington, DC 20006 Roy P. Lessy, Jr., Esquire Office of the Executive Legal Director Edward F. Meany U.S. Nuclear Regulatory Commission Designated Representative of 4
Washington, DC 20555 155 Washington Road the Town of Rye 4
Robert A. Backus, Esquire Rye, NH 03870 116 Lowell Street P.O. Box 516 Calvin A. Canney Mancehster, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street
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Assistant Attorney General Portsmouth, NH 03801
- Department of the Attorney General Augusta, ME 04333 Dana Bisbee, Esquire Assistant Attorney General Mr. John B. Tanzer Office of the Attorney General Designated Representative of 208 State House Annex the Town of Hampton-Concord, NH 03842 5 Morningside Drive Hampton, NH 03842 Anne Verge, Chairperson Board of Selectmen Roberta C. Pevear Town Hall Designated Representative of South Hampton, NH 03842 the Town of Hampton Falls Drinkwater Road Patrick J. McKeon Hampton Falls, NH 03844 Selectmen's Office 10 Central Road Mrs. Sandra Gavutis Rye, NH 03870 Designated Representative of the Town of Kensington David R. Lewis, Esquire RFD 1 Atomic Safety and Licensing Board East Kingston, NH 03827 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Jo Ann Shotwell, Esquire Assistant Attorney General Mr. Angie Machiros Environmental Protection Bureau Chairman of the Board of Selectmen Department of the Attorney General Town of Newbury One Ashburton Place, 19th Floor Newbury, MA 01950
. Boston, MA 02108 Maynard B. Pearson Senator Gordon J. Humphrey 40 Monroe Street U.S. Senate Amesbury, MA 01913 Washington, DC 20510 (Attn: Tom Burack)
Senator Gordon J. Humphrey 1 Pillsbury Street Diana P. Randall_
Concord, NH 03301 70 Collins Street (Attn: Herb Boynton)
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SEabrook, NH 03874 Richard E. Sullivan, Mayor Donald E. Chick City Hall Town Manager Newburyport, MA 01950 Town of Exeter 10 Front Street Exeter, NH 03833
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