ML20081F501
| ML20081F501 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/28/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| S13N-574, NUDOCS 8311030106 | |
| Download: ML20081F501 (5) | |
Text
.
o PUBLIC SERVICE sua sTAm 4::1, osc -
Companyof New HampeNr*
1671 WorceWor Road Fromingham, Massachusetts 01701 (617) - 872 - 8100 October 28, 1983 SBN-574 T.F. B7 1.2 United States Nuclear Regulatory Commission Washington, D. C. 20S55 Attention:
Mr. George W. Knighton, Chief Licensing B-ch No. 3 Division of Acensing
References:
(a)
Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b)
PSNH Letter, dated February 14, 1983, " Revised Open Item Response (SRP 9 5 4; Power Systems Branch)",
J. DeVincentis to G. W. Knighton (c)
PSNH Letter, dated June 24, 1983, " Revised Response to SER Outstanding Issue #1 (SER Section 2 3 1, Meteorological and Effluent Treatment Systems Branch)", J. DeVincentis to G. W. Knighton
Dear Sir:
Our response to your Request for Additional Information 430.130 (Reference (b)), which war subsequently included in OL Application Amendment 48, indicated that electric heaters will be installed in the diesel generator air intake plenum to heat the intake air to at least 500F. At that time, our diesel generator manufacturer had informed us that an air temperature of 500F or greater at the turbocharger inlet was necessary to assure sufficient engine air temperature pre-heating to allow continuous no-load operation without the accumulation of products of combustion and lubricating products in the exhaust system.
Subsequent discussions with the manufacturer have revealed that there is no effect on the diesel generator output or operation under load after running at no-load through the ambient air temperature range of -20 F to 1040F.
0 This temperature range is within the maximum and minimum 100-year, 8-hour return period identified in our response to your Request for Additional Information 451.11 (Reference (c)), which was subsequently included in OL-Application Amendment 49 8311030106 831028
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United' States Nuclear Regulatory Commission October-28, 1983
' Attention:
Mr.. George W. Knighton Page 2 It is therefore our position that the need to install electric heaters in the diesel generator air intake plenum has been obviated. We have enclosed an annotated FSAR page which addresses engine response at low temperatures. This will be included in a future OL Application-Amendment.
Very truly yours,
-YANKEE ATOMIC ELECTRIC COMPANY O
w John DeVincentis Project Manager ALL/cs Enclosure cc: Atomic Safety and Licensing Board Service List
a William S. J:rd:n, Ill, Esquir3 Brentwood Board of Selectmen Harmon & Weiss RED Dalton Road 1725 1 Street, N.W. Suite 506 Brentwood, New Hampshire 03833 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 Washington, DC 20555 the Town of Rye 155 Washington Road Robert A. Backus, Esquire Rye, NH 03870 116 Lowell Street
'P.O. Box 516 Calvin A. Canney Nhncehster, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street 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 Norningside 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. n Keon 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 l
Boston, MA 02108 Maynard B. Pearson l
Senator Gordon J. Humphrey 40 Monroe Street l
U.S. Senate Amesbury, MA 01913 l
Washington, DC 20510 (Attn: Tom Burack)
Senator Gordon J. Humphrey 1 Pillsbury Street i
l Diana P. Randall Concord, NH 03301
(
70 Collins Street (Attn: Herb Boynton)
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 l
l
r A;aendznt 45 SB 1 & 2 Juns 1982 FSAR i
l r-of the diesel generator building. The crankcase exhauster is not safety related and is not required for operation of the engine. Failure of the exhauster does not affect the starting capability of the engine.
Each diesel-generator. unit is capable of operating at its maximum rated output under the-following outdoor service conditions and for the durations indicated during the following weather disturbances:
0-Outdoor Service Conditions:-- 20 fe lW a.
1.
Ambient air intaker 2.
Humidity:.'20 to 80% (in D.C. room) 20 to 100% (outdoors) 46 b.
Weather disturbances:
1.
A tornado pressure transient causing an atmospheric pressure reduction of 3 psi in 3 seconds followed by a rise to normal pressure in 3 seconds. A shorter transient (1.5 seconds) 46 will not affect engine operation and output.
2.
A hurricane or northeastern storm pressure of 26 inches Hg for a duration'of one (1) hour. The engine is capable of continued operation for up to 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> at 26" Hg with no affect Op0p(
on operation and output, since the combustion air system is y-designed for approximately 50% excess air.
9.5.8.3 Safety Evaluation There are two redundant diesel generators for each nuclear unit. Each redundant diesel engine has an independent combustion air intake and exhaust system.
This redundancy and independence prevents the loss of function of more than one diesel engine in the event of a component or system failure.
The air intake and exhaust systems of each diesel engine are isolated from those of the other diesel engine and are also isolated from any motor-driven equipment by partition walls. Should an incident occur, such as an exhaust leak or an accidental discharge of a CO2 extinguisher, it would have no effect on the redundant diesel engine.
' The physical location of the air intakes makes the possibility of the use
- However, 2 extinguisher in the area of the air intakes rather remote.
- o f a CO should such extinguishers be discharged in the immediate area of the air Based intake, there would be no significant effect 'on engine operation.
on tests from a diesel manufacturer, a CO2 extinguisher discharging at the air intake for a period of over 30 seconds will dilute the air intake by less than one (1) percent. All diesel engines run at 30% excess air, which also helps in minimizing any effect of such an incident.
O 9.5-33
._L
l' fn se r r
A low ambient intake temperature will have no effect on engine operation under load and output. Combustion air is pre-heated in the turbocharger and is supplied to the engine at a temperature of 1000F minimum and 2000F maximum. An air temperature of -200F or greater at the turbocharger inlet will result in sufficient engine air temperature pre-heating in the turbocharger to allow continuous no-load operation. To prevent excessive accumulation of unburned combustion products, station procedures will require the diesel generator be operated at 50% or greater load for one hour after each 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of. running at no load.
Should testing be required at less than 25% loading for more than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> cumulative operation for maintenance or trouble-shooting, station procedures will require at least a 30-minute load test, at a minimum of 25% loading, following such operations. This will maintain the engine in the standby condition, ready to accept load as required.
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