ML19329D498
| ML19329D498 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 10/15/1974 |
| From: | US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19329D496 | List: |
| References | |
| NUDOCS 8003090123 | |
| Download: ML19329D498 (2) | |
Text
4;. J.*
llh.
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-Control room isolation should be followed immediately by the start-up and operation of the emergency recirculating charcoal filter or equivalent equipment designed to remove or otherwise limit the accumulation of contamination within the control room.
Under certain meteorological conditions control room isolation may not be sufficient by itself to limit chlorine concentrations
'to levels below those which cause physical discomfort or disability.
Therefore, the use of self-contained breathing apparatus should be considered when developing a chlorine release emergency plan.
Since calculations indicate that rapid increases in chlorine concentrations are possible, emergency plan provisions and rehearsal of these provisions for immediate donning of breathing apparatus on detection of chlorine release are necessary.
Storage provisions for breathing apparatus and procedur;s for use 'should be such that operators can begin using the apparatus within two minutes after an alarm. Donning of breathing apparatus should be mandatory prior to the determination of the cause of an alarm.
A toxic environment may be present for several days or longer if a chlorine leak cannot be fixed or the leaking container removed.
In any event, adequate bottled air capacity (at least six hours) should be readily available on-site to assure that sufficient time is available to locate and transport bottled air from off-site locations. This off-site supply should be capable of delivering several hundred hours of bottled air to the members of the emergency crew.
Isolation and air supply equipment relied on should accommodate a single failure of an active component and still perform the required function.
(In the case of self-centained breathing apparatus this may be accomplished by supplytng one extra unit for every three units required'.)
Protection requirements for plants located nearby other facilities that store significant quantities of chlorine or plants located nearby major chlorine transportation routes will be determined on a case-by-case basis.
Similarly plants having storage facilities that might accidentally release a total of 500 pounds of chlorine or less will be reviewed on a case-by-case basis to deter-mine need for protection.against accidental release.
s 8003090i M (L