ML20054J980
| ML20054J980 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/09/1982 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20054J949 | List:
|
| References | |
| 05-1-02-II-9, 5-1-2-II-9, NUDOCS 8206300260 | |
| Download: ML20054J980 (3) | |
Text
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PLANT OPERATIONS MANUAL
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.s Volume 05 05-1-02-11-9 Section 02 Revision:
11 Date: 4-9-82 I
OFF-NORMAL EVENT PROCEDURE HICH AIRBORNE SAFETY RELATED h
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Prepared:
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!4 Reviewed:
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w" Nuclear P1 t Qualit / Superintendent g/
Technical Review Reviewed:,/ %
l Oper
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(s i-Approved:
M, 1, QfL(J( )
' Assistant Plant Manager 4NTL PSRC:
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i List of Effective Pages:
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- GRAND CULT NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE lTttle: High Airborne lNo.:
05-1-02-11-9 l Revision:
11 jPage:
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l 1.0 PURPOSE / DISCUSSION 1.1 The purpose of this procedure is to describe the general actions to be taken in the event high airborne activity is detected within the plant.
1.2 This procedure may interface with the Emergency Plan.
1.3 This procedure deals with events where activity levels are low enough i
that autonatic isolations may not occur.
If high levels of activity or very rapid release rates cause system isolations, carryout the immediate actions of this procedure.
2.0 SYMPTOMS 2.1 Local CAM alarm 2.2 Increasing activity on the Off Gas Radwaste Building, Containment Building, Turbine Building, Control Room, or Fuel Area Handling Area 4
Exhaust Vents on 1H13-P844 or lH13-P604 2.3 Higher than normal area radiation monitor module indication or alam h
on 1H13-P844, 2.4 AREA RAD PNL P844 TROUBLE annunciates on 1H13-P680.
2.5 Visible spills and/or leaks from contaminated systems.
2.6 Carbon Vault High Radiation Annunciator.
t 3.0 AUTOMATIC ACTIONS 3.1 High-High Radiation of I x 106 cpm in Radwaste Building Vent radiation monitor isolates supply fan SV41-C002A and B and their associated dampers and exhaust fans SV41-C004A and B and their associdted dampers.
3.2 High-High Radiation levels of 4 mR/hr sensed by the Fuel Handling Area Vent radiation monitor or 35 mR/hr sensed by the AUX BLDG FUEL HDLG AREA POOL EXHAUST Ventilation monitors will start Standby Gas Treatment and shut the containment Cooling, Auxiliary Building, and Fuel Handling Area Ventilation Suction and Discharge Valves.
3.3 High-High Radiation levels of 5 mR/hr sensed by the Containment Ventilation monitor shuts Drywell and Containment Purge Fans, Dryvell Cooling Valves and Containment Cooling Discharge, placing the Containment System in the Clean-up Mode.
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GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
Title:
High Airborne No.:
05-1-02-11-9
, Revision:
11 Page:
2 4.0 IKKEDIATE ACTIONS
,4. 1 _If activity. levels are high enough to cause automatic isolation, ver.ify that they occur.
4.2 If high airborne occurs in the control room, don emergency breathing apparatus.
4.3 Notify Health Physics of the high airborne activity.
4.4 If airborne radiation levels reach any alarm setpoint, announce twice on the PA:
"THERE IS HIGH AIRBORNE ACTIVITY IN (BUILDING OR AREA).
ALL PERSONNEL EVACUATE (BUILDING OR AREA)".
4.5 If possible, isolate the source of the airborne activity and/or stop any process or action which may have caused the release.
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4.6 If high airborne activity is, from the Of f Gas System check Of f Gas System Loop seals, vents, or drain ' valves that could be leaking thru, and gasket leaking in recombiner and air ejector rooms.
4.7 If the source of airborne activity is a rupture of an instrument line' C,a feeding the MSIV Leakage Control System instrumentation IE32-PT-N051A, E, J, N and IE32-PT-N061A, E, J, N, then shut the appropriate MSIV's and drain valves to isolate the leak.
5.0 SUBSEQUENT ACTIONS 5.1 Proceed.to implement the Emergency Plan if directed by the Shift Supervisor / Shift Sup'erintendent.
- 5. 2-Monitor af fected area radiation monitoring modules, annunciators, and chart recorders to determine extent of the airborne problem.
5.3 consult with the Health. Physics Section about samples, surveys, and i re-entry requirements.
NOTE When in doubt, or if HP cannot be immediately dispatched, use of respiratory protection should be considered prior to entry.
5.4 Locate the source of the leak and isolate it or shift to standby j
components in the Of f Gas System to terminate the le ak.
5.5 Evaluate the feasibility of continued operation with system degradation and/or area uninhabitability.
5.6 Refer to ONEP 05-1-02-11-3, Of fsite Gaseous Release, if leak cannot _ be
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terminated.
5.7 Observe Radiological Ef fluent Technical Specification Section 3.11.2.1, Gaseous E f fluents.
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