ML19257C102
| ML19257C102 | |
| Person / Time | |
|---|---|
| Issue date: | 01/03/1980 |
| From: | Butcher E Office of Nuclear Reactor Regulation |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8001240391 | |
| Download: ML19257C102 (2) | |
Text
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JAN 3 1980 MEMORANDUM FOR:
N. Moseley, Director, Division of Reactor Operations Inspections FROM:
E. Butcher, Plant Systems Branch, Division of Operating Reactors
SUBJECT:
INCIDENT RESPONSE PROCEDURES At a meeting with members of the incident response team current status operations group on December 27, 1979, you requested that members of the group review a draft listing of information which should be obtained periodically from the site during a nuclear incident. The purpose of this memorandum is to provide my comments on the list.
The idea of identifying in advance information necessary for the staff to understand and monitor the course of a nuclear incident clearly has merit. However, it should also be recognized that it is neither possible nor desirable to develop a list that includes all of the possible senarios throughout the entire period of a full spectrum of credible incidents. The list as currently written appears to attempt to do this and the result is a long tedious list which could mask the really important information.
In reality the NRC's response to an incident is phased and different infomation is required during different phases of the response.
For example, the first task (phase I) is to identify which type of incident is occurring.
Is it a LOCA, a turbine trip with loss of offsite power, or some other combination of numerous possiblities?
It should be a fairly simple task to develop a list of the major plant parameters necessary to determine the type of event that is occurring.
Once the event has been identified the specific informa-tion pertinent to tha specific event can be collected.
Collecting this information would be in the second phase of the response. For some major types of events (e.g., LOCA) it would be possible to develop the required infomation list in advance, for others the list will have to be developed on a case basis.
As an example of this phased approach, following is a list of phase I items for my personal area of responsibility, the electrical power and distrubition system.
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, 1.
How many independent offsite power sources are available all the way from the grid through the switchyard to the Class IE buses?
2.
Status of diesel generators and Class IE buses (i.e., which are not available). A listing of LC0's (limiting conditions for operation) in effect for the electrical power system before the event would be readily available even before the operators have a chance to verify the overall status of the system.
3.
Has the system dispatcher been informed of the incident and does the nuclear plant have priority on the grid?
Detailed infomation such as load and voltage levels for individuals buses would be requested in later phases as the need for the infoma-tion is identified.
I have discussed these coments with several of my electrical power engineering colleagues in the Plant Systems Branch, DOR, and they are in general agreement.
J c I. b C I _'
E. Butcher Plant Systems Branch Division of Operating Reactors cc:
F. Rosa T. Dunning M. Chiramal I. Ahmed J.T. Beard D. Tondi G. Lainas 1796 026