ML20101G429
| ML20101G429 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 06/03/1992 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Chandrasekaran NRC |
| References | |
| NUDOCS 9206260033 | |
| Download: ML20101G429 (3) | |
Text
JUN03'92'11:03AMd~ENUCLEARBLdGJ ki73 GENaiserEnwyy ABWR Date 6/s/92.
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From Jaek foV Mail Code 7 s L 175 Curtner Avenue San Jose, CA 95125 Phone (408) 925 4 8 L4 FAX (408)925-1193 or (408) 925-1687 Subject M\\/ A C e d aus m ow davswq s
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L 9206260033 920603 PDR ADOCK 05200001 A
Ari 03 '92 11:044M G E lOCLEAR BLDG J P.2/3 ABWR umooxx
- SMndard_ Plant m'B 113.2.2.4 Plant Vent Discharge Radiation h1onitorin'g This system monitors the plant vent discharge for gross radiation level during normal plant operation and collects halogen and particulate samples for laboratory analysis. The discharge throughghis common plant vent includes HVAC exhausts from the reactor, turbine, radwaste and s *rvice buildings. Also, this system utilites a high-range radiation monitor that measures finion products in plant gaseous effluents during and following an accident.
l A representative sarnple is continuously extracted from the ventilation ducting through two isokinetic probes in accordance with ANSI N13.1 and passed through the containment ventilation sample panels for monitoring and sampling, and returned to the ventilation du: ting. Each sample panel has a pair of filters (one for particulate collection and one for halegen sollectics ) in paralle! (with respect to flow) for continuous gaseous radiation sampling.
11 4.2.2.5 Raduste Ef!1uent Radiation The gross radiation detection assembly consists h!onitoring of a shielded cha=ber, beta gamma sensitive GM tubes, and a check source. The extended range This subsystem continue,usly monitors the detector assembly consists of an ionization radioactivity in the radwaste effluent prior to chamber which measure radiation levels up to its discharge and drainage.
l 1 05 Ci/cc. A radiation monitor in the main control room analyzes and visua!!y displays the Liquid waste can be discharged from the measured radiation level.
sample tanks containing liquids that have been processed through one or more treatment systems The sample panel shielded chambers can be such as evaporation, filtration, and ion purged with room air by using two solenoid valves exchange. Prior to discharge, the liquid is operated from the control room to check detector extracted from the liquid drain treatment response to background radiation, thus checking process pipe, passed through a liquid sample operability of the gross radiation channel, panel which contains a detection assembly for gross radiation monitoring, and returned to the Power is supplied from 120-Vac local bus for process pipe. The detection assembly consists the radiation =onitor and for the sample panel.
of a scintillation detector mounted in a shielded sarnt'; Aa.,ber equipped with a check The radiation monitor initiates trips for source. A radiation monitor in the control room alarm indications on high high, high, and low analyzes and sisually displays the measured radiation from each detector assembly. Also, the gross radiation level, sampled line is monitored for high or kw flow indications and alarming.
The sample panel cin.mber and lines can be drained to allow asses; ment of background Table 11.5-2 presents the gaseous and airborne buildup. The panel measures and indicates monitors for the effluent radiation monitoring sample line flow. A solenoid operated check system.
source operated f.cm the control room can be used to check operability of the channel.
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- The reactor building essential electrical HVAC, diesel generator HVAC, main control room HVAC, service building clean ventilation, technical support HVAC, and the electrical building ventilation systems contain no radicactive systems.
The only releases to the environs by these systems would first have to be brought into the-buildings by their own supply fans.
- Hence, monitoring of these exhausts are-not required or provided.
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