The Browns Ferry Nuclear Plant, a Tennessee Valley Authority (TVA) operated facility, is located in Athens, Alabama. Browns Ferry Unit 1 uses a General Electric Mark 1 boiling water reactor. (Use the following link for a diagram of a Boiling Water Reactor.)

 

 perform calculations based on a postulated accident. 

 

1. For the postulated accident, perform a RASCAL analysis using the input data below. What protective action advice should be given based on the doses calculated?

 

1. Using the exact input, but changing the release pathway term to the wet well, how do the calculated results change? Explain this difference, if any.

 

 Source Term  

   Type:                               Time Core Is Uncovered

   Shutdown:                       2015/11/09 07:30

   Core uncovered:             2015/11/09 10:00

   Core recovered:               No

 

 Release Pathway  

   Type:                               BWR - Release through Dry Well

                                         via Direct, Unfiltered Pathway

   Release height:                10 m

 

   Release events

     2015/11/09 10:00           Leak Rate (% Vol) Design

     2015/11/09 10:00           Sprays Off

 

 Meteorology  

 

   Actual Observations:

 

Time	Wind Direction	Wind Speed	Stability Class	Precipitation
8:15	25	12	A	No Rain
8:30	23	12	A	No Rain
8:45	24	11	A	No Rain

 

   Calculated projections should terminate 8 hours after the events has occurred (18:00 hours).