ML20132B736

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Proposed Tech Specs for Containment Pressure Monitor & Containment Water Level Monitor
ML20132B736
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 07/19/1985
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML20132B728 List:
References
RTR-NUREG-0737, RTR-NUREG-737 NUDOCS 8507250108
Download: ML20132B736 (4)


Text

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.. w ATTACHMENT Consumers Power Company Big Rock Point Plant Docket 50-155 eT l

PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES July 19, 1985 l

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8507250108 850719 PDR ADOCK 05000155 p PDR 3 Pages IC0785-0239-NLO4

60

~6.3.2 Refueling Operation Controls Interlocks shall be provided to prevent all motion with any of the refueling cranes (namely, jib cranes, transfer cask winch) which are positioned over the reactor vessel whenever any control rod is not fully inserted in the core and the mode selector switch is in the " refuel" position.

6.3.3 Operating Requirements (a) All reactor refueling safet'y system sensors and trip devices shall be functionally tested at each major refueling shutdown and shall be maintained in the specified condition during all refueling operations.

(b) The refueling operation controls including position interlocks shall be functionally tested at each major refueling shutdown.

.6.4 PLANT MONITORING SYSTEMS The plant monitoring systems include the process radiation monitoring systems, the area monitoring system, the reactor water level monitors in the Reactor Depressurizing System, and the containment pressure and water level monitoring systems.

6.4.1 Process Radiation Monitoring Systems (a) Air Ejector Off-Gas Monitoring System (see Section 13.1)

(b) Stack-Gas Monitoring System (see Section 13.1)

(c) Emergency Condenser Vent Monitor The emergency condenser vent shall be monitored to detect a significant release of radioactive material. Monitoring shall be supplied by two independent gamma sensitive instrumentation channels employing scintillation crystal sensing devices. These channels shall have a range of 0.1 to 100 mr/hr and shall be provided with an alarm which shall annunciate in the control room to inform the operator of a release of radioactive material.

One of the emergency condenser vent monitors shall be in service at all times during power operation. The monitors shall be set to alarm at approximately 10 mr above the maximum expected background during operation of the emergency condenser. The calibration shall be checked at least monthly.

Proposed 1/7/85  !

Proposed 7/19/85 ll TSB0585-00208-NLO2

62 6.4.2 (Contd)

(c) The containment atmosphere shall be monitored by two high range gamma monitors. The monitors are designed to measure gamma radiation in containment under accident conditions from I R/hr to IE+06 R/hr. The monitors are located external to the containment sphere. The readouts of the monitors are located in the control room.

Both high range containment atmosphere gamma monitors shall normally be in service during power operation. If either monitor is inoperable, restore to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or, in lieu of any other report required by Specification 6.9.2 (administrative controls), prepare and submit a Special Report to the Commission pursuant to Specification 6.9.3 (administrative controls) within the next 30 days outlining the cause of the inoperability and the plans for restoring the system to operable status. A channel check shall be performed for each monitor at least once per month, and channel calibration shall be performed at each refueling outage.

The channel calibration for all ranges above 10R/hr may be performed by electronic signal substitution.

(d) Portable gamma dose-rate measuring instruments and portable neutron dose-rate measuring instruments shall be provided for establishing permissible working limits. These instruments shall be calibrated at least once every three months. Portable high range gamma measuring instruments shall be calibrated from 0-20 R/hr every three months and on all scales every six months.

6.4.3 Reactor Water Level Monitors in the Reactor Depressurization System Four narrow range water level monitors are provided in the main control room as part of the Reactor Depressurizing System to be used for detection of adequate core cooling during accident situations.

At least two reactor water level indicators in the Reactor Depressurization System shall be operable during power operation.

6.4.4 Containment Pressure and Water Level Monitoring Systems Two containment pressure monitors and two containment water level monitors are provided with readouts in the main control room for accident monitoring. The containment pressure and water level monitors shall be operable during power operations. Plant shutdown is required within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> following a 7 day period when one monitor of either type is inoperable. Plant shutdown is required within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> following a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period when both monitors of one type are inoperable. A channel check of each monitor shall be done at least once per month and a channel calibration shall be performed at each major refueling shutdown but not less frequently than once every 18 months.

Proposed 1/7/85 l TSB0585-0020B-NLO2

76b 7.6(Contd)

Reference Procedure System or Function Frequency of Within These Undergoing Test Routine Tests Specifications Calibration of area One month or less Section 6.4.2 monitoring system Channel comparison check One mo' nth or less Section 6.4.3 of reactor level indicating instruments in the Reactor Depressurization System Calibration of reactor At each major Section 6.4.3 level indicating instru- refueling shutdown ments in the Reactor Depressurizing System Steam drum safety valve One month or less Section 4.1.2 position monitor check Calibration of steam drum At each major refueling Section 4.1.2 safety valve position shutdown monitors High radiation trip closure At each major refueling Section 6.4.2 of the containment shutdown ventilation isolation valves Channel Check of High One month or less Section 6.4.2 Range Containment Gamma Monitors Channel calibration of At each major Section 6.4.2 High Range Containment refueling shutdown Gamma Monitors Channel Check of One month or less Section 6.4.4 containment pressure and water level monitors Channel Calibration of At each major Section 6.4.4 containment pressure refueling shutdown

  • and water level monitors
  • But no less than once every 18 months Proposed 1/7/85 I Proposed 7/19/85 ll TSB0585-00205-NLO2