ML20140C078
| ML20140C078 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/27/1997 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20140C076 | List: |
| References | |
| NUDOCS 9704020067 | |
| Download: ML20140C078 (6) | |
Text
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1 PLANT SYSTEMS November 3,1995 i
3/4.7.11 ULTIMATE HEAT SINK LIMITING CONDITION FOR OPERATION 3.7.11 The ultimate heat sink shall be OPERABLE with
- r. :v:r:ge water
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temperature of less than or equal to 75'F 4t the Unit : intake structen.
APPLICABILITY: MODES 1, 2, 3, AND 4
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ACTION:
With the requirements of the above specification not satisfied, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCE REQUIREMENTS i
i 4.7.11 The ultimate heat sink shall be determined OPERABLE:
a.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by verifying the w water ;
temperature at the Unit--2-intake structure-to be within I g
limits.
i b.
At least once per 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> by verifying the -:ver:g: water I
temperature -at-the Unit 2 intake-structum to be within j limits when the-everage water temperature exceeds 70*F.
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9704020067 970327 PDR ADOCK 05000336 P
(%-
glLSTONE-UNIT 2 3/4 7-34 Amendment No. JU. JU.//7
-. = _..
November 3,1995 SY5 m s BASES l
3/4.7.10 DELETED 3/4.7.11 ULTIMATE HEAT SINK i
The limitations on the ultimate heat sink temperature ensure that sufficient cooling capacity is available to either, 1) provide normal cooldown of the facility or 2) to mitigate the effects of accident conditions within acce able limits.
The limitations on maximum temperature are based on a 30-day cooling water supply to safety related equipment without exceeding their design basis temperature.
PSEcr e
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i MILLSTONE - UNIT 2 B 3/4 7-7.
AmendmentNos.J/E,)T)'
0165
k e
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INSERT A Various indications are available to monitor the temperature of the ultimate heat i
sink (UHS). The following guidelines apply to ensure the UHS Technical Specification limit is not exceeded.
The control room indications are normally used to ensure compliance with this specification. Control room indications are acceptable because of the close correlation between control room indications and local Service Water System (SWS) header indications (historically within approximately 2 F). The highest l
reading valid temperature obtained from the Unit 2 intake structure and the inlets to the Circulating Water System water boxes shall be used to verify the UHS l
i temperature limit of 75 F is not exceeded.
When the highest reading valid control room indication indicates the temperature of the UHS is > 70 F, local SWS header indication must be used.
The highest reading valid local SWS header temperature shall be used to verify the UHS temperature limit of 75 F is not exceeded. Normally, local SWS header temperature will be taken at the inlet to the vital AC switchgear room cooling coils. If the local SWS header temperature cannot be taken at the inlet to the vital AC switchgear room cooling coils, the inlet to the Reactor Building 1
Closed Cooling Water heat exchangers, or other acceptable instrumentation, should be used to determine SWS header temperature.
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Docket No. 50-336 B16342 Millstone Nuclear Power Station, Unit No. 2 j
Proposed Revision to Technical Specifications Ultimate Heat Sink i
Retyped Pages
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4 March 1997 j
m i
o PLANT SYSTEMS 3/4.7.'11 ULTINATE HEAT SIK LIMITING COM ITION FOR OPERATION
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3.7.11 The ultimate heat sink shall be OPERABLE with a water temperature of less thai or equal to 75*F.
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APPLICABILITY: NODES 1, 2, 3, AND 4 ACTION:
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With the requirements of the above specification not satisfied, be in at i
least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
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$URVEILLANCE REQUIREMENTS l
4.7.11 The ultimate heat sink shall be determined OPERABLE:
?
a.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by verifying the water temperature to be within limits.
b.
At least once per 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> by verifying the water temperature to l
be within limits when the water temperature exceeds 70*F.
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MILLSTONE - UNIT 2 3/47-34 Amendment No. JJJ JJJ, JJJ, 0287
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PUWIT'5YSTDt$
b sAsts i
I 3/4.7.10 DELETED j
3/4.7.11 ULTIMATE HEAT SINK
}
The limitations on the ultimate heat sink temperature ensure that sufficient j
cooling capacity is available to either, j
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1) provide normal cooldown of the facility, or 2) to mitigate the effects of accident conditions within acceptable limits.
The limitations on maximum temperature are based on a 30-day cooling water i
supply to safety related equipment without exceeding their design basis i
temperature.
l Various indications are available to monitor the temperature of the ultimate heat :f r.k (WS).
The following guidelines apply to ensure the UHS Technical 4
j opecification limit is not exceeded.
The control room indications are normally used to ensure compliance with this specification.
Control room indications are acceptable because of the close i
correlation between control room indications and local Service Water System (SWS) header indications (historically within approximately 2*F).
The highest j
reading valid temperature obtained from the Unit 2 intake structure and the inlets to the Circulating Water System water boxes shall be used to verify the 3
j UHS temperature limit of 75'F is not exceeded.
i When the highest reading valid control room indication indicates the temperature of the UHS is > 70*F, local SWS header indications must be used.
i The highest reading valid local SWS header temperature shall be used to verify i
the UHS temperature limit of 75'F is not exceeded.
Normally, local SWS header temperature will be taken at the inlet to the vital AC switchgear room cooling I
coils.
If the local SWS header temperature cannot be taken at the inlet to i
the vital AC switchgear room cooling coils, the inlet to the Reactor Building Closed Cooling Water heater exchangers, or other acceptable instrumentation j
should be used to determine SWS header temperature.
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NILLSTONE - UNIT 2 s 3/4 7-7 Amendment Nos. JJ7, J7f j
oase
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