ML19351G321

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Retyped Tech Specs 3.1.2.3,4.1.2.3.1,4.1.2.3.2,3/4.1.2 & 3/41.1.3 Re Reactivity Control Sys Charging Pump for Shutdown
ML19351G321
Person / Time
Site: North Anna Dominion icon.png
Issue date: 02/17/1981
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML19351G317 List:
References
NUDOCS 8102230507
Download: ML19351G321 (4)
v • d • e


Text

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REACTIVITY CONTROL SYSTEMS CHARGING PUMP - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.1.2.3 At least one charging pump in the Doron injection flow path required by Specification 3.1.2.1 shall be OPERABLE.

i APPLICABILITY: MODES 5 and 6.

t  !

ACTION:

a. With no charging pump OPERABLE, suspend all operations involving CORE i ALTERATIONS or positive reactivity changes until one charging pump is i restored to OPERABLE status,
b. With no charging pump OPERABLE and the opposite unit in MODE 1, 2, 3, or 4, immediately initiate corrective action to restore at least one charging pump to OPERABLE status as soon as possible.

SURVEILLANCE REQUIREMENTS i

4.1.2.3.1 At least the above required charging pump shall be demonstrated OPERABLE by verifying, that on recirculation flow, the pump develops a discharge pressure of 1 2410 psig when tested pursuant to Specification 4.0.5.

4.1.2.3.2 All charging pumps, except the above required OPERABLE pump, shall be demonstrated inoperable 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 switches in the Control Room have been placed in the pull to lock position.

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NORTH ANNA-UNIT 1 3/4 1-11

'810 2230$o1

REACTIVITY CONTROL SYSTEMS BASES 3/4.1.2 B0 RATION SYSTEMS (Continued)

The limits on contained water volume and boron concentration of the RWST also ensure a pH value of between J.5 and 11.0 for the solution recirculated within the containment after a LOCA. This pH minimizes the stressevolution corrosion onof mechanical iodine and minimizes systems the effect of @s.loride and caustic and component At least one charging pump must remain operable at all times when the opposite unit is in MODE 1, 2, 3, or 4. This is required to maintain the charging pump cross-connect system operational.

3/41.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) limit the potential effects of rod misalignment on associated accident analyses. OPERABILITY of the control rod position indicators is required to determine control rod positions and thereby ensure compliance with the control rod alignment and insertion limits.

The ACTION statements which permit limited variations from the basic requirements are accompanied by additional restrictions which ensure that the origini design criteria are met. Misalignment of a rod requires measurement of peaking factors or a restriction in THERMAL POWER; either of these restrictions provides assurance of fuel rod integrity during continued operation. In addition those accident analyses affected by a misaligned rod are reevaluated to confirm that the results remain valid during future operation.

Control rod positions and OPERABILITY of the rod position indicators are required to be verified on a nominal basis of once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frequent verification required if an automatic monitoring channel is inoperable. These verification frequencies are adequate for assuring that the applicable LC0's are satisfied.

The maximum rod drop time restriction is consistent with the as-sumed rod drop time used in the accident analyses. Measurement with T 2 500 F and with all reactor coolant pumps operating ensures that tM9 measured drop times will be representative of insertion times ex-perienced during a reactor trip at operating conditions.

NORTH ANNA-UNIT 1 B 3/4 1-4

REACTIVITY CONTROL SYSTEMS CHARGING PUMP - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.1.2.3 At least one charging pump in the boron injection flow path required by Specification 3.1.2.1 shall be OPERABLE.

APPLICABILITY: MODES 5 and 6.

ACTI0rl:

a. With no charging pump OPERABLE, suspend all operations involving CORE ALTERATIONS or positive reactivity changes until one charging pump is restored to OPERABLE status.
b. With no charging pump OPERABLE and the opposite unit in MODE 1, 2, 3, or 4, immediately initiate corrective action to restore at least one charging pump to OPERABLE status as soon as possible.

SURVEILLANCE REQUIREMENTS 4.1.2.3.1 At least the above required charging pump shall be demonstrated OPERABLE by verifying, that on recirculation flow, the pump develops a discharge pressure of 2 2410 psig when tested pursuant to Specification 4.0.5.

4.1.2.3.2 Al' charging pumps, except the above required OPERABLE pump, shall be demonstrated inoperable 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 switches in the Control Room have been placed in the pull to lock position.

I I

NORTH ANNA-UNIT 1 3/4 1-11

REACTIVITY CONTROL SYSTEMS BASES 3/4.1.2 B0 RATION SYSTEMS (Continued)

The limits on contained water volume and boron concentration of the RWST also ensure a pH value of between 8.5 and 11.0 for the solution recirculated within the containment after a LOCA. This pH minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.

At least one charging pump must remain operable at all times when the opposite unit is in MODE 1, 2, 3, or 4. This is required to maintain the charging pump -

cross-connect system operational.

3/41.1.3 MOVABLE CONTROL ASSEMBLIES fne specif1 cations of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) limit the potential effects of rod misalignment on associated accident analyses. OPERABILITY of the control rod position indicators is required to determine control rod positions and thereby ensure compliance with the control rod alignment and insertion limits.

The ACTION statements which permit ifmited variations from the basic requirements are acccmpanied by additional restrictions which enture that the original design criteria are met. Misalignment of a rod requires measurement of peaking factors or a restriction in THERMAL POWER; either of these restrictions provides assurance of fuel rod integrity during continued operation. In addition those accident analyses affected by a misaligned rod are reevaluated to confirm that the results remain valid during future operation.

Control rod positions and OPERABILITY of the rod position indicators are required to be verified on a nominal basis of once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frequent verification required if an automatic monitoring channel is inoperable. These verification frequencies are adequate for assuring that the applicable LCO's are satisfied.

The maximum rod drop time restriction is consistent with the as-sumed rod drop time used in the accident analyses Measurement with T i 500 F and with all reactor coolant pumps uperating ensures that tN9 me

asured drop times will be representative of insertion times ex-perienced during a reactor trip at operating conditions.

NORTH ANNA-UNIT 1 8 3/4 1-4

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