ML20245H884
| ML20245H884 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/11/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20245H887 | List: |
| References | |
| NUDOCS 8908170337 | |
| Download: ML20245H884 (2) | |
Text
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.e PLANT SYSTEMS 3/4.7.6 CONTROL ROOM EMERGENCY VENTILATION SYSTEM LIMITING CONDITION FOR OPERATION 3.7.6.1 Two independent control room emergency ventilation systems shall be OPERA 3LE.
APPLICABILITY:
MODES 1, 2, 3 and 4.
ACTION:
Vith one control room emergency ventilation system inoperable, restore the-inoperable system to OPERABLE status within 7 days or be in at least HOT STANDBY vithin 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 />.
SURVEILLANCE REQUIREMENTS 4.7.6.1 Each control room emergency ventilation system shall be demonstrated I
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 j
temperature is f 110*F when the control room emergency ventilation system is operating, b.
At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flov through the HEPA filters and charcoal adsorbers and verifying that the system operates for at least 15 minutes.
c.
At least once per 18 months 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 communicating with the system by:
DAVIS-BESSE, UNIT 1 3/4 7-17 Amendment No.135 8908170337 890811 PDR ADOCK 05000346 P
,7, N
PLANT' SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)
,y i
1.
Verifying that with the system operating at a flow rate of 3300 cfm + 10%'and exhausting through the HEPA filters and charcoal liidsorbers, the total bypass flow of the system is
< 1% when the system is tested by admitting DOP at the
_system intake.
2.
Verifying that the system satisfies the in-place testing i
acceptance criteria and uses the test procedures of Regulatory l
Positions C.5.a. C.5.c and C.S.d of Regulatory Guide 1.52, x
Revision 1,' July 1976, and the system flow rate is 3300'cfm i 10%.
3.
Verifying within 31 days after removal that a laboratory analysis of a representative carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 1 July 1976, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 1. July 1976.*
4.
Ver.ifying a system flow rate of 3300 cfm + 10% during system operation when tested in accordance with XNSI 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 within 31 days after removal that a laboratory analysis of a representative carbon sample obtained-in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 1, July 1976..
meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 1 July 1976.
e.
At least once per 18 months by:
E.
l 1.
Verifying that the pressure drop across the combined HEPA filters and chircoal adsorber banks is < 4.4 inches Water Gauge while operating the system at a flow rate of 3300 cfm i 10%.
2.
Verifying that the control room normal ventilation system is isolated by a SFAS test signal and a Station Vent Radiation High test signal.
- The pre-and post-loading sweep medium temperature shall be 80*C for Test 5.b of Table 2. Regulatory Guide 1.52, Revision 1. July 1976.
DAVIS-BESSE, UNIT 1 3/4 7-18 Amendment No. JM,135
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