ML20246C001
| ML20246C001 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/09/1989 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20246C000 | List: |
| References | |
| NUDOCS 8908240153 | |
| Download: ML20246C001 (7) | |
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PROPOSED TECHNICAL SPECIFICATION CHANGES l
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.3.5.1.13 'The Seismic Monitoring Instrumentation shall be operable with a minimum measurement range from 0.01 to 1.0 g (2-25.4 HZ for Triaxial Response Spectrum Recorders).
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J The Degraded Voltage Monitoring relay settings are based on the short term starting voltage protection as well as long term running voltage protection.
The 4.16 KV undervoltage relay setpoints are based on the allowaole starting voltage plus maximum system voltage drops to the motor terminals, which allows approximately 78% of motor rated voltage at the motor terminals.
The 460V undervoltage relay setpoint is based on long term motor voltage requirements plus the maximum feeder voltage drop allowance resulting in a 92% setting of motor rated voltage.
The OPERABILITY of the accident monitoring instrumentation ensures that sufficient information is available on selected plant parameters to monitor and assess these variables during and following an accident.
This capability is consistent with the recommendation of Regulatory Guide 1.97,
" Instrumentation for Light-Water-Cooled Nuclear Power Plants to Assess Plant Conditions During and Following an Accident," December 1975 and NUREG-0578, "TMI-2 Lessons Learned Task Force Status Report and Short-Term Recommendations."
The OPERABILITY of the chlorine detection system ensures that sufficient capability is available to promptly detect and initiate protective action in the event of an accidental chlorine release.
This capability is required to protect control room personnel and is consistent with the recommendations of Regulatory Guide 1.95, " Protection of Nuclear Power Plant Control Room Operators against an Accidental Chlorine Release,"
February 1975.
The subcooled margin monitors (SMM), and core-exit thermocouple are a result of the Inadequate Core Cooling (ICC) instrumentation required by Item II.F.2 NUREG-0737.
The function of the ICC instrumentation is to increase the ability of the plant operators to diagnose the approach to and recovery from ICC.
Additionally, they aid in tracking reactor coolant inventory.
These instruments are included in the Technical Specifications at the request of NRC Generic Letter 83-37 and are not required by the accident analysis, nor to bring the plant to cold shutdown conditions.
The OPERABILITY of the Seismic Monitoring Instrumentation ensures that sufficient capability is available to promptly determine the magnitude of a seismic event and evaluate the response of those features important to safety.
This capability is required to permit comparison of the measured l
response to that used in the design basis for the facility to determine if I
f plant shutdown is required pursuant to Appendix "A" of 10CFR Part 100.
The instrumentation is consistent with the recommendations of Safety Guide 12,
" Instrumentation for Earthquake," published March 19, 1971, and NUREG-0800 Section 3.7.4, " Seismic Instrumentation."
REFERENCE
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