ML20054J979
| ML20054J979 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 03/24/1982 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20054J949 | List:
|
| References | |
| 05-1-02-II-3, 5-1-2-II-3, NUDOCS 8206300258 | |
| Download: ML20054J979 (3) | |
Text
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t PLANT OPERATIONS MANUAL i
Volume 05 05-1 -0 2-II-3 Section 02 Fevision:
10 Date: 3-24-82 OFF NORMAL EVENT PROCEDURE OFFSITE CASEOUS RELEASES SAFETY RELAT_ED A
J Prepared:
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Reviewed:
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2 Nuclear Plant Ouality Superintendent p/ 7ech'nical Review Reviewed:
I A 6perationg' Superintendent Approved:
Assi'stant Plant Manager PSRC:
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GRAND CULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
Title:
Offsite Gaseous Releases No.:
05-1-02-11-3 Revision:
10 Page:
I s
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1.0 PURPOSE / DISCUSSION 1.1 The purpose of this procedure is to provide ins t ruc t ion s in minimizing an Of fsite Gaseous Release.
1.2 This procedure will interface with the Emergency Plan.
1.3 This procedure will cover the period from the discovery of ef fluent release rate increases, to the activation of the EmerFency Plan if necessary.
2.0 SYMPTOMS 2.1 Increasing counts on the Turbine Building, Radwaste Building, or Auxiliary Building ventilation effluent monitors.
2.2 Excessive activity detected outside the plant by of fsite environmental air monitor or routine surveys.
2.3 off gas po s t treatment radiation monitor counts increasing or alarming.
l 2.4 Containment and drywell, of f gas and radwaste, turbine, or auxiliary building ventilation release radiation monitors Hi-Hi radiation annunciators.
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2.5 Control room ventilation intake radiation alarm or increasing readings.
3.0 AUTOMATIC ACTIONS 3.1 High radiation level of 4 nR/hr sensed by the fuel handling area ventilation monitor or 35 mR/hr sensed by the fuel pool sweep ventilation monitor will start standby gas treatment and shut the containment l
cooling, auxiliary building, and fuel handling areas ventilation suction and discharge valves.
3.2 High radiation levels of 5 mR/hr sensed by the containment ve n t ila t ion monitor shuts drywell and containment purge fans, drywell cooling I
valves and containment cooling discharge, placing the containment system l
in the clean-up mode.
1 3.3 High radiation levels of 1 x 106 cpm sensed by the radwaste building ventilation release monitor stops the radwaste building exhaust fans and associated dampers shut, and Radwaste Building Supply Fans and associated dampers shut.
3.4 High radiation levels of 5 nR/hr sensed at the intake of the control building ventilation system will isolate the control building ventilation system and start the control room fresh air units.
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s O
GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
Title:
Offsite Gaseous Releases No.:
05-1-02-II-3 Revision:
10 Page:
2 i
4.0 IMMEDIATE OPERATOR ACTION 4.1 Verify the appropriate automatic actions have occurred.
Isolate ventilation systems as necessary to minimize releases, and consider isolating the Control Room Ventilation before the high radiation setpoint is reached.
4.2 Notify the Shift Supervisor or Shift Superintendent of plant conditions, i
4.3 Determine and isolate the source of the gaseous activity (i.e.
valve packings, loop seals, radwaste activities, maintenance, vent or drain valves open).
4.4 Contact Health Physics to take radiation and airborne surveys, and a grab sample of the af fected system to determine that the monitor is accurate.
4.5 Evacuate personnel from suspect areas of high gaseous activity.
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5.0 SUBSEQUENT ACTIONS 5.1 Proceed to implement the emergency plan as directed by the Shift Supervisor or Shift Superintendent.
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5.2 If offsite gaseous released is from the Turbine Building Exhaust and the mechanical vacuum pumps are running, trip the mechanical vacuum pumps.
5.3 Reduce power or shutdown the plant if necessary to minimize the release as directed by the Shift Supervisor or Shif t Suprintendent.
l 5.4 If plant is to be shutdown refer to IOI 03-1-01-3, Plant Shutdown.
1 5.5 If a high airborne activity exists carry out actions of ONEP 05-1-02-11-9, High Airborne.
5.6 Limit access to areas of high radiation /high airborne to reduce personnel i
exposure.
5.7 To prevent the spread of airborne activity, maintain the integrity of buildings and space by verifying all cutside doors or in between personnel access doors are shut and operating as designed.
5.8 If the source of the problem has been found and corrected, continue l
operation in accordance with 101 03-1-01-2, Power Operations.
5.9 Refer to Radiological Effluent Technical Specification Section 3.11.2.1, Gaseous E f fluents.
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