ML20053C769

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Proposed Tech Spec Pages 3/42 1-19,3/4 1-20b & B 3/4 1-3 Re Reactivity Control Sys
ML20053C769
Person / Time
Site: Beaver Valley
Issue date: 05/26/1982
From:
DUQUESNE LIGHT CO.
To:
Shared Package
ML20053C765 List:
References
NUDOCS 8206020547
Download: ML20053C769 (4)
v • d • e


Text

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REACTIVITY CONTROL SYSTEMS LIMITING CONDITION FOR OPERATION (Continued) b)

The SHUTDOWN MARGIN requirement of Specification 3.1.1.1 is determined at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

c)

A power distribution map is obtained from the movable incore detectors and F (Z) and F$H are verified to be Q

within their limits within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

d)

The THERMAL POWER level is reduced to less than or equal to 75% of RATED THERMAL POWER within one hour and within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> the high neutron flux trip setpoint is reduced to less than or equal to 85% of RATED THERMAL POWER.

THERMAL POWER shall be maintained less than or equal to 75% of RATED THERMAL POWER until compliance with ACTIONS 3.1.3.1.c.3.a and 3.1.3.1.c.3.c above are demonstrated.

SURVEILLANCE REQUIREMENTS 4.1.3.1.1 The position of each full length rod shall be determined to be within i

+ 12 steps (indicated position) of the group demand position at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (allowing for one hour thermal soak after rod motion, the absolute value of which does not exceed 6 steps during the thermal soak period) except during time intervals when the Rod Position Deviation Monitor is inoperable, then verify the group positions at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, l

4.1. 3.1. 2 Each full length rod not fully inserted in the core shall be determined to be OPERABLE by movement of at least 10 steps in any one direction at least once per 31 days.

  • See Special Test Exceptions 3.10.2 and 3.10.4 i

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BEAVER VALLEY - UNIT 1 3/4 1-19 4

PROPOSED WORDING 8o06020 M.

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REACTIVITY CONTROL SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.1.3.2.2 Each of the above required rod position indicator (s) shall be determined to be OPERABLE by performance of a CHANNEL FUNCTIONAL TEST at least once per 18 months.

  • For Core PHYSICS TESTING in Mode 2, primary detector voltage measurements may be used to determine the position of rods in shutdown banks A and B and control banks A and B for the purpose of satisfying Specification 3.1.3.2.

During Mode 2 operations, rod position indicators for shutdown banks A and B and control banks A and B may deviate from the' group demand indicators by greater than i 12 steps during reactor startup and shutdown operations, while rods are being withdrawn or-inserted.

If the rod position indicators for shutdown banks A and B and control banks A and B deviate by greater than i 12 steps from the group demand

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indicator, rod withdrawal or insertion may continue until the desired group height is achieved. When the desired group height is achieved, a one hour soak time is allowed to permit stabilization of the rod position analog indicators. To attain thermal equilibrium during Lthe one hour soak time, the absolute value of rod motion shall not exceed 6 steps.

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j BEAVER VALLEY - UNIT 1 3/4 1-20b PROPOSED WORDING

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jL REACTIVITY; CONTROL SYSTEMS BASES 3/4.1.2 B0 RATION SYSTEMS (continued)

The boration capability of either system is sufficient to provide a SHUT-DOWN MARGIN from all operating conditions of 1.0% Ak/k after xenon decay and cooldown to 200 F.

The maximum boration capability requirements occur at E0L from full power equilibrium xenon conditions and requires 11,336 gallons of 7000 ppm borated sater from the boric acid storage tanks or 49,917 gallons of 2000 ppm borated water from the refueling water storage tank.

With the RC5 temperature below 200 F, one injection system is acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting CORE ALTERATIONS and positive reactivity change in the event the single injection system becomes inoperable.

The boration capability required below 200 F is sufficient to provide a SHUTDOWN MARGIN of 1% Ak/k after xenon decay and cooldown from 200 F to 140 F.

This condition requires either 5000 gallons of 7000 ppm borated water from the boric acid storage tanks or 175,000 gallons of 2000 ppm borated water from the refueling water storage tank.

3/4.1.3 MOVABLE CONTROL ASSEMBLIES.

The specifications of this secti re that (1) acceptable power distribution limits are maintained, (2) the minmum 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. OPERABLE condition for the analog rod position indicators is defined as being capable of indicating rod position to within + 12 steps of the associated group demand indicator.

The specifications of this section permit a one hour' soak time after rod motion to permit stabilization of known thermal drif t in the rod position analog instruments. To attain the thermal equilibrium conditions during the on'e hour soak time, the absolute value of rod motion shall not exceed 6 step,s.

The use of rod position indication primary voltage measuremen'ts is permitted as a backup to direct reading of the analog indicators.

Comparison of the group demand indicator to the calibration curve is sufficient to allow determination that a control rod is indeed misaligned from its bank when primary voltaga measurements are used.

Comparison of the group demand counters to the bank insertion linits with verification of rod position with the analog rod position indicators (after thermal soak after rod motion) is sufficient verification that the' control rods are above the insertion limits.

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