ML19339C889
| ML19339C889 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/09/1981 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML19339C888 | List: |
| References | |
| NUDOCS 8102120246 | |
| Download: ML19339C889 (9) | |
Text
O NORTil ANNA UNIT 1 PROPOSED TECIINICAL SPECIFICATION CllANGE l
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' REACTIVITY CONTROL SYSTEMS CHARGING PUMP
,HUTDOWN 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 OPERA 3LE.
APPLICABILITY: MODES 5 and 6.
ACTION:
With no charging pump OPERABLE, suspend all operations involving CORE I
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ALTERATIONS or positive reactivity changes until one charging pume is restored to OPERABLE status, b
SEE tGTAcuED PAGE SURVEILLANCE REQUIREMENTS 4.1.2.3.1 At least the above required charging pump shall be demonstrated OPERABLE by verifying, that on recirculation ' low, the pump develops a discharge pressure of y, 2410 psig when tested pursuant to Specification 4.0.5.
4.1.2.3.2 All charging pumps, except the above required OPERABLE pum:,
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.
MORTH ANNA-UNIT 1 3/4 1-11
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With no charging pianp OPERABLE and the opposite unit in MODE 1,2,3, or 4, innediately initiate corrective action to restore at least one charging pump to OPERABLE status as soon as possible.
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I REACTIVITY CONTROL SYSTFg 5
t BASES 3/4.1.2 BORATION SYSTEMS (Continued)
The limits on contained water volume and boron concentration of j
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 fodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.
l GEE ATRCHED PAC &
3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained. (2) the minicum SHJ' T00WN 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 original design criteria are met. Misslignment 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 verifications 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-st.ned rod drop time used in the accident analyses. Measurement with T
> 500*F and with all reactor coolant pumps operating ensures that tM9 measured drop-times wiii be representative of inserticn times ex-perienced during a reactor trip at operating conditions.
NORTH ANNA - UNIT 1 8 3/4 1-4
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BASES 3/4.1.2 BORATION SYSTEM 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.
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REACTIVITY CONTROL SYSTEMS CHARGING PUMP - SHUTOOWN LIMITING CONDITION FOR OPERATION 3.1.2.3 One charging pump in the boron injection flow path required by Specifi-cation 3.1.2.1 shall be OPERABLE.
APPLICABILITY: MODES 5 and 6.
ACTION:
With no charging pump OPERABLE, suspend all operations involving CORE ALTERATIONS l
CL.
or positive reactivity changes until one charging pump is restored to OPERABLE status.
6 GEE ATT AC HED PAGE SURVEILLANCE REQUIREMENTS 4.1.2.3.1 The above required charging pump shall be demonstrated OPERABLE by verifying, that on recirculation flow, the pump develops a discharge pressure of greater than or equal to 2410 psig when tested pursuant to Specification 4.0.5.
4.1.2.3.2 All charging pumps, except the above required QPERABLE 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 control switch is in the pull to lock position.
NORTH ANNA - UNIT 2 3/4 1-11
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With no charging pump OPERABLE and the opposite unit in MODE 1,2,3, or 4, i
innediately initiate corrective action to restore at least one charging pump to OPERABLE status as soon as possible.
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- REACTIVITY CONTROL SYSTEMS BASES 3/4.1.2 80 RATION SYSTEMS (Continued)
The contained water volume limits include allowance for water not available because of discharge line location and other physical characteristics.
The OPERABILITY of one boron injection system during REFUEllNG insures that this system is available for reactivity control while in MODE 6.
The limits on contained water volume and baron 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.
SEE ATTAC RED PAGE 3/4.1.3 MOVABLE CONTROL ASSEMBLIES l
The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTOOWN MARGIN is main-tained, and (3) limit the potential effects of red misalignment on associated accident analyses.
OPERABILITY of the control rod position indicators is required to determins 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 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 verifications 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 assumed rod drop time used in the accident analyses.
Measurement with T,yg greater than or equal to 500*F and with all reactor coolant pumps operating ensures that the measured drop times will be representative of insertion times experienced during a reactor trip at operating conditions.
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RASES 3/4.1.2 BORATION SYSTEM At least one charging pump must remain operable at all times whed the opposite unit is in MODE 1, 2, 3, or 4 cross-connect system operational,This is required to maintain the charging pump
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