ML20151W299

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Proposed Tech Specs Revising Section 3/4.7.6, Plant Systems - CREVS & Associated Bases
ML20151W299
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 09/08/1998
From:
CENTERIOR ENERGY
To:
Shared Package
ML20151W277 List:
References
NUDOCS 9809150254
Download: ML20151W299 (5)
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Text

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1 LAR 97-0005 Revision 2

. Pa'g 8 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 OPERABLE.

APPLICABILITY: MODES 1,2,3 and 4.

ACTION:

L With one control room emergency ventilation 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 />,
b. With one channel of Station Vent Normal Rance Radiation Monitorine instrumentation illpperable. restore _thejnonerable3hannel to OPERABLE status. or isolate the control room normal ventilation system and njace at least one control room emercency ventilation system train in operation within 7 days
c. With both channels of Station Vent Normal RaDreladiation Monitorine instrumentation inonerable. within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. isolate the control room normal ventilation system and niace at least y one control room emercency ventilati.on system train in ooeration.

SURVEILLANCE REOUIREMENTS

, 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 less than or equal to 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, flow thrcugh the HEPA filters and charcoal adsorbers and verifying that the system operates for at least 15 minutes.
c. At least once each REFUELING INTERVAL 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. 135,155,217, 9009150254 980908-PDR ADOCK 05000346 p PDR

. LAR 97-0005 Revision 2

. Pdge 9 1

PLANT SYSTEMS SURVEILLANCE REOUIREMENTS (Continued) l

1. Verifying that the cleanup system satisfies the in-place penetration and bypass I leakage testing acceptance criteria ofless than 1% and uses the test procedure guidance in Regulatory Positions C.5.a, C.5.c and C.5.d of Regulatory Guide 1

1.52, Revision 2, March 1978, and the system flow rate is 3300 cfm i10%; i

2. Verifying, within 31 days after removal, that a laboratory analysis of a i representative carbon sample obtained in accordance with Regulatory Position  !

C.6.b of Regulatory Guide 1.52, Revision 2, March 1978, meets the laboratory j testing criteria of Regulatory Position C.6.a* of Regulatory Guide 1.52, Revision !

2, March 1978, for a methyliodide penetration ofless than 1%; and  ;

3. Verifying a system flaw rate of 3300 cfm 10% during system operation when tested in accordance with ANSI N510-1980.
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 I accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2, I March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a* of Regulatory Guide 1.52, Revision 2, March 1978, for a methyliodide penetration ofless than 1%.
e. At least once each REFUELING INTERVAL by:
1. Verifying that the pressure drop across the combined HEPA filters and charcoal  !

adsorber banks is less than 4.4 inches Water Gauge while operating the system at j a flow rate of 3300 cfm 10%;

2. Verifying that the control room normal ventilation system is isolated by a SFAS test signal and a Station Vent Normal Rance Radiation Monitorine Radiation Higletest signal; and
  • The test is performed in accordance with ASTM D 3803-1979 with the following conditions: 1) equilibrate for 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> at 30 Cn0% relative humidity (RH),2) challenge for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at 30 Cn0% RH,3) elution for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at 30 Cn0% RH.

DAVIS-BESSE, UNIT 1 3/4718 Amendment No. 134,135,155, 209,217,

l I'AR 97-0005 Revision 2 l 'Pa ge 10

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PLANT SYSTEMS Tills PAGE PROVIDED l FORllHRidATION Ollly i SURVEILLANCE REQUIREMENTS (Continued) i 1

3. Verifying that the makeup flow of the system is 300 cfm i 10%  !

when supplying the control room with outside air. l

, f. After each complete or partial replacement of a HEPA filter bank, l l

by verifying that the cleanup system satisfies the in-place penetration and bypass leakage testing acceptance criteria of less than 1% in accordance with ANSI N510-1980 for a DOP test l . aerosol while operating the system at a flow rate of 3300 cfm i 10%.

g. After each complete or partial replacement of a charcoal adsorber l bank, by verifying that the cleanup system satisfies the in-place l penetration and bypass leakage testing acceptance criteria of less

! than 1% in accordance with ANSI N510-1980 for a halogenated hydro- l carbon refrigerant test gas while operating the system at -a flow j rate of 3300 cfm i 10%. l l

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l DAVIS-BESSE, UNIT 1 3/4 7-19 Amendment No.155 l

LAR 97-0005 Revision 2 Page 11 MIS PAGE PROVIDED BASES FORINFORIRATION ONLY

'the flow path can be established. The ability for local, manual operation is demonstrated by verifying the presence of the handvheels for all manual valves and the presence of either handvheels or available power supply for motor operated valves.

3/4.7.2 STEAN CENERATOR PRESSURE / TEMPERATURE LIMITATION The limitation on steam generator pressure and temperature ensures that the pressure induced stresses in the steam generators do not exceed the maximum allovable fracture toughness stress limits. The limitations of 110*F and 237 peig are based on a steam generator RT NDT of 40*F and are sufficient to prevent brittle fracture.

3/4.7.3 COMPONENT COOLING WATER SYSTDi The' OPERABILIIT of the component cooling water system ensures that sufficient cooling capacity is available for continued operation of safety related-equipment during normal and accident conditions. The redundan't cooling capacity of this system, assuming a single failure, is consistent with the assumptions used in the safety analyses.

3/4.7.4 SERVICE VATER SYSTEM The OPERABILITY of:the service water system ensures that sufficient cooling capacity is available fsr ..'tinued operation of safety related equipment during normal'and acc ident conditions. The redundant cooling capanity of this system, assumiu.g a single failure, is consistent with the assumptions used in the saf ety analyspS'.

3/4.7.5 ULTIMATE HEAT SINK The limitations on the ultimate heat sink level and 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 acceptable limits.

  • The limitations on minimum vater level and maximum temperature are based on providing a 30 day cooling water supply to safety related I

, equipment without exceeding their design basis temperature and is ansistent with the recommendations of Regulatory Guide 1.27 " Ultimate Beat Sink for Nuclear Plants" March 1974.

3/4.7.6 CONTROL ROOM EMERGENCY VENTILATION SYSTEM The OPERABILITY of the control room emergency ventilation system ensures that 1) the ambient air temperature does not exceed the allovable temperature for continuous duty rating for the equipment and instrumentation cooled by this system.and 2) the control room vill remain habitable for operations personnel during and following all credible accident conditions. The OPERABILITY of this system in -

conjunction with control room design provisions is based on limiting the radiation' exposure to personn'el occupying the control room to 5 rem or less whole body, or its equivalent. This limitation is consistent with the requirements of General Design Criterion 19 of Appendix "A",

10 CFR 50.

DAVIS-BESSE, UNIT 1 B 3/4 7-4 Amendment No.103

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[,.. , LAR 97-0005 Revision 2 )

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Page 12

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PLANT SYSTEMS r

BASES The Station Vent Normal Rance Radiation Monitorine isolation function orovides that under the reauired conditions. an isolation signal will be niven. The Station Vent Normal Ranee i ' Rndintion Monitors orovide isolation and shutdown of the control room normal ventilation L li21LCE With one or both channels of Station Vent Normal Ranee Radiation Monitorine instrumentation inonerable. the orovisions of Action statements b or c. resnectivelv. are anolicable. The orovisions of Action statement a are not anolicable.

l Under the Action statements for inonerable Station Vent Normal Range Radiation i Monitorina instrumentation. should the control room normal ventilation system be isolated and at

j. least one train of the control room emereency ventilation system be olaced in operation. these l L

systems would be in a state eauivalent to that which they would be in following an actual hich radiation condition. Pir.nt oneration can continue indefinitely in this state. orovided that control room temocrature can be maintained in an accentable rance. with the control room emercency i ventilation system obtainine fresh-air makeuo as described in the Undated Safety Analysis Reoort Section 9.4.1. " Control Room." l 1

l l l Surveillance Reauirement 4.7.6.1.e.2 reautres verification that the control room normal ventilation system can be isolated by a Station Vent Normal Ranee Radiation Monitorine test

liigilak Additional testing reouirements for the Station Vent Normal Ranee Radiation Monitorine instrumentation are orovided in the ODCM for caseous effluent releases.

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DAVIS-BESSE. UNIT 1 B 3/4 7-4a Amendment No. l i

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