B13576, Proposed Tech Specs Re Control Room Emergency Ventilation Sys
| ML20055G402 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/13/1990 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20055G401 | List: |
| References | |
| B13576, NUDOCS 9007230137 | |
| Download: ML20055G402 (4) | |
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Docket No. 50-311 B13576 Millstone Nuclear Power Station, Unit No. 2 Proposed Change to Technical Specifications Control Room Emergency Ventilation System i
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3/4.7.6 CONTROL ROOM EMERGENCY VENJilATION SYSTEM
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LIMITING CONDITION FOR OPERATION 3.7.6.1 Two independent control room emergency ventilation systems shall be OPERABLE.
APPLICABILITY: ALL MODES ACTION:
Modes 1, 2, 3, and 4:
With one Control Room Emergency Air Clean-up System inoperable, restore the inoperable system to OPERABLE status within 7 days or be in at'least HOT STANDBY within the next 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 />.
MODES 5 and 6*:
a.
With one Control Room Emergency Air Clean Up System inoperable, restore the inoperable system to OPERABLE status within 7 days or initiate and maintain operation of the remaining OPERABLE Control Room Emergency Air Clean-Up System in the recirculation mode, i
b.
With both Control Room Emergency Air Clean Up Systems inoperable, or with t'ie OPERABLE Control Room Emergency Air Clean-Up System required to be in the recirculation mode by ACTION (a.) not capable of being powered by an OPERABLE emergency power source, suspend all L
operations involving CORE ALTERATIONS or positive reactivity changes.
In Modes 5 and 6, when a Control Room Emergency Air Clean-up system is L
deter:ained to be inoperable solely because its emergency power source is inoperable, or solely because its normal power source is inoperable, it may be considered OPERABLE for the purpose of satisfying the requirements i
of 3.7.6.1 Limiting Condition for Operation, provided:
(1)its corresponding normal E emergency power source is OPERABLE; and (2) all of its redundant system (s), subsystem (s), train (s), component (s) and device (s) are OPERABLE, or likewise satisfy the requirements of the specification.
Unless both conditions (1) and (2) are satisfied within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, then Limiting Condition for Operation (LCO) 3.7.6.1.a or l
3.7.6.1.b shall be invoked as applicable.
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MILLSTONE e UNIT 2 3/4 7-16 Amendment No. 72, JJE e-
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PLANT SYSTEMS SURVEILLANCE REQUIRENENTS I
4.7.6.1 Each control room emergency ventilation system shall be demonstrated OPERABLE:
a.
At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the control room air temperature is.5 100'F.
b.
At least once per 31 days on a STAGGERED TEST BASIS by initiating from the control room, flow through the HEPA filters and charcoal ubsorber train and verifying that the system operates for at least 15 minutes.
i c.
At least once per 18 mosns or (1) after any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any ventilation zone communi-cating with the system by:
j 1.
Verifying that the cleanup system satisfies the in place testing acceptance criteria and uses the test procedures of Regulatory Positions C.S.a. C.S.c and C.S.d of Regulatory Guide 1.52, Revision 2, March 1978, and the system flow rate is 2500 cfm i 10%.
2.
Verifying within 31 days after removal that a laboratory analysis of a representative carbon sample obtained in accor-dance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2 March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revi-sion 2, March 1978.
The carbon sample shall have a removal efficiency of 2 95 percent.
3.
Verifying a system flow rate of 2500 cfm i 10% during system operation when tested in accordance with ANSI N510-1975.
d.
After every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation by verifying l
within 31 days after removal that a laboratory analysis of a repre-sentative carbon sample obtained in accordance with Regulatory l
Position C 6.b of Regulatory Guide 1.52, Revision 2, March 1978, l
meets the laboratory testing criteria of Regulatory Position C.6 a of Regulatory Guide 1.52, Revision 2, March 1978.
e.
At least once per 18 months by:
1.
Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is less than 6 inches Water Gauge while operating the system at a flow rate of 2500 cfm i 10%.
2.
Verifying tFat on a recirculation signal, the system automati-cally switches into a. recirculation mode of operation with flow through the HEPA filters and charcoal adsorber banks.
MILLSTONE - UNIT 2 3/4 7-17 Amendment Nos. JJ, //, Jpp, JJS, 125
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f SURVEILLANCE REQUIREMENT (Continued) 3.
Verifying that control room air in leakage is less.than 100 SCFM with the control Air Conditioning System operating in J
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the recirculation / filtration mode.
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After each complete or partial repitanent of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to;
,c 99% of the DOP when they are tested in-place in accordance with ANSI N5101975 while operating the system at a flow rate of 2500 cfm i 10%.
.g.
After each complete or partial replacement of; charcoal adsorber bank by verifying that the charcoal adsorbers removo greater than or i
equal to 99% of' a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510-1975 while operating the system at a flow rate of 2500 cfm 10%.
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MILLSTONE - UNIT 2 3/4 7-18 Amendment No. JE, 100
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