ML18153B657

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Proposed Tech Specs,Addressing Interim Mod & Operation of Main Control & Emergency Switchgear Rooms
ML18153B657
Person / Time
Site: Surry  Dominion icon.png
Issue date: 03/20/1989
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18153B656 List:
References
NUDOCS 8903310003
Download: ML18153B657 (7)
v • d • e


Text

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e ATTACHMENT 2 Proposed Technical Specification Surry Power Station

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/ 90320 *' '

8903310003_ 85000280 '. 1 PDR ADOCK O PNU p

  • TS 3.14-2
b. Flow to and from the component cooling heat exchangers required by Specification 3.13.
3. At least two circulating water pumps are operating or are operable.
4. At least two emergency service water pumps are operable; these two pumps will service both units simultaneously.
5. Two service water fl owpaths to the charging pump service water subsystem are operable.
6. Two service water flowpaths to the recirculation spray subsystems are operable.

B. There sha 11 be an operating service water fl ow path to and from one operating main control and emergency switchgear rooms air conditioning condenser and at least one operable service water flow path to and from at least one operable main control and emergency switchgear rooms air conditioning condenser whenever fuel is loaded in reactor core. Refer to rj Section 3.23.C for air conditioning system operability requirements above cold shutdown.

C. The requirements of Specifications A-5 and A-6 may be modified to allow unit operation with only one operable flow path to the charging pump service water subsystem and to the recirculation spray subsystems. If the affected systems are not restored to the requirements of Specifications A-5 and A-6 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, the reactor shall be placed in hot shutdown. If the requirements of Specifications A-5 and A-6 are not met within an additional 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the reactor shall be

e TS 3.23-1 3.23 MAIN CONTROL ROOM AND EMERGENCY SWITCHGEAR ROOM VENTILATION AND AIR CONDITIONING SYSTEMS Appl icabil itv Applies to the main control room (MCR) and emergency switchgear room (ESGR) and air conditioning system and emergency ventilation system.

Objective To specify requirements to ensure the proper function of the main control and emergency switchgear room air conditioning system and emergency ventilation system.

Specification A. Both trains of the main control and emergency switchgear rooms' emergency ventilation system shall be operable whenever either unit is above cold shutdown.

B. With one train of the main control and emergency switchgear room emergency ventilation system i noperab 1e for any reason, return the inoperable train to a operable status within 7 days or be in at least Hot Shutdown 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 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

  • C. The main control and emergency switchgear room air conditioning system shall be operable as delineated in the following:
1. Chiller Refrigeration Units
a. Chillers l-VS-E-4A, 48, and 4C must be operable whenever either unit is above Cold Shutdown.
  • This interim specification is necessary until the air conditioning *system modifications scheduled for the end of cycle 10 on Unit 1 and cycle 10 on Unit 2 are completed. Following completion of the permanent modifications, a revised air conditioning system specification will be submitted.

. t TS 3.23-2

b. If one chiller becomes inoperable, return the inoperable chiller to operable status within seven (7) days or bring both units to Hot Shutdown within the next six (6) hours and be 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 />.
2. Air Handling Units (AHU)
a. Unit 1 air handling units,
  • l-VS-AC-1, l-VS-AC-2, l-VS-AC-6, and l-VS-AC-7, must be operable whenever Unit 1 is above Cold Shutdown.
1. If one Unit 1 MCR AHU becomes inoperable, return the inoperable AHU to operable status within seven (7) days or bring Unit 1 to Hot Shutdown within the next six (6) hours and be 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 />.
2. If one Unit 1 ESGR AHU becomes inoperable, bring Un it 1 to Hot Shutdown within the next six (6) hours and be 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. Unit 2 air handling units, 2-VS-AC-8, 2-VS-AC-9, 2-VS-AC-6, and 2-VS-AC-7 must be operable whenever Unit 2 is above Cold Shutdown.
1. If one Unit 2*McR AHU becomes inoperable, return the inoperable AHU to operable status within seven (7) days or bring Unit 2 to Hot Shutdown within the next six (6) hours and be 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 />.
2. If one Unit 2 ESGR AHU becomes inoperable,- bring Unit 2 to Hot Shutdown within the next six (6) hours and be in Cold Shutdown with{n the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

e TS 3.23-3

c. Unit 1 ESGR AHLI drive motors, l-VS-FM0-6A, l-VS-FM0-6B, l-VS-FM0-7A, and l-VS-FM0-7B must be operable whenever Unit 1 is above Cold Shutdown.
1. If a Unit 1 ESGR AHLI drive motor becomes inoperable, return the inoperable drive motor to operable status within seven ( 7) days or bring Unit 1 to Hot Shutdown within six (6) hours and be 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 />.
d. Unit 2 ESGR AHLI drive motors, 2-VS-FM0-6A, 2-VS-FM0-6B, 2-VS-FM0-7A, * ~nd 2-VS-FM0-7B must be operable whenever Unit 2 is above Cold Shutdown.
1. If a Unit 2 ESGR AHU drive motor becomes inoperable, return the inoperable dri~e motor to operable* status within seven (7) days or bring Unit 2 to Hot Shutdown within six (6) hours and be .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 />.

When the supply of compressed bottled air is depleted, the main control room and emergency switchgear room emergency ventilation system is manually started to continue to maintain the control room pressure at the design positive pressure so that.leakage is outleakage. One train of the main control room emergency ventilation consists of one fan powered from an independent emergency power source.

The main control and emergency switchgear room emergency ventilation system is designed to filter the intake air to the control room pressure envelope, which consists of the control room, relay rooms, and emergency switchgear rooms during a LOCA.

,. I e TS 3.23-4 High efficiency particulate air (HEPA) filters are installed before the charcoal adsorbers to prevent clogging of the iodine adsorbers.

  • The charcoal adsorbers are installed to reduce the potential intake of radio-iodine to the control room. The in-place test results should indicate a system leaktightness of less than 1 percent bypass leakage for the charcoa 1 adsorbers and a HEPA efficiency of at 1east 99. 5 percent removal of DOP particulates. The laboratory carbon sample test results should indicate a radioactive methyl iodide removal efficiency of at least 95 percent for expected accident conditions. The control room dose calculations assume only 90 percent iodine removal efficiency for the air passing through the charcoal filters. Therefore, if the efficiencies of the HEPA filters and charcoal adsorbers are as specified, at the temperatures, flow rates and velocities within the design values of the.

system, the resulting doses will be less than the allowable levels stated in Criterion 19 of the General Design Criteria for Nuclear Power Plants, Appendix A to 10 CFR Part 50.

If the system is found to be inoperable, there is no immediate threat to the.control room, and reactor operation may continue for a limited period of time while repairs are being made. If the system cannot be repaired within the specified time, procedures are initiated to establish conditions for which the filter system is not required.

System operating restrictions will be imposed on the modified MCR and ESGR air conditioning system until the permanent upgrade is implemented.

The restrictions will supplement the current Technical Specification limiting conditions for operation. The basis for the operating restrictions is as follows:

The modified system will require the operation of two chillers, two of the four MCR air handling units, and four ESGR air handling units to maintain design temperatures under maximum heat load conditions.

Taking credible single failures into consideration requires that redundant equipment be available during operation. As such, the interim limiting conditions for operation will require that three chillers and eight air handling units be operable when at power

TS 3.23-5 operation. Further, the interim 1 imi ting condit i ans for operation will require that both drive motors on each ESGR air handling unit be operable. In addition to the equipment restrictions above, a fire watch will be required during this interim period in both unit's ESGR and MER #3 to address Appendix R considerations.

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