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- From: jcliu@four-lab4.Berkeley.EDU (James C. Liu)
- Newsgroups: soc.culture.japan
- Subject: Re: Greenpeace
- Date: 20 Nov 1992 23:44:22 GMT
- Organization: UC Berkeley Dept. of Nuclear Engineering
- Lines: 65
- Sender: jcliu@four-lab4.Berkeley.EDU
- Message-ID: <1ejt8mINN8ar@agate.berkeley.edu>
- References: <1992Nov20.012126.7986@rkna50.riken.go.jp>
- NNTP-Posting-Host: four-lab4.berkeley.edu
- Keywords: shinpainaide kudasai
-
- In article <1992Nov20.012126.7986@rkna50.riken.go.jp>
- hughes@rkna50.riken.go.jp (Martin Hughes) writes concerning Pu shipment:
-
- >Because (a) it is one of the more (note, I do not say most)
- >dangereous substances known to man, and any mid-ocean accident
- >could result in thousands + of deaths, plus considerable pollution.
- >(b) despite the fact that the
- >plutonium being shipped is not of weapons grade, it could, if
- >hi-jacked, be made into such - especially by certain extreme
- > governments. (c) Plutonium is used to fuel fast-breeder
- >reactors. As far as I am aware, most other countries with a fast-
- >breeder Program have dropped it, due to safety factors (U.S, France,
- >U.K.). (d) It has to be said that Japans existing nuclear power
- >program has proved to be less than 100% safe. I understand that
- >an accident with a fast-breeder type reactor would be a lot more
- >serious than with a conventional nuclear reactor.
- >I could name other reasons, but for the moment, these will
- >suffice, I think.
-
- and also in article <Bxz8Fy.Ito@world.std.com> cmr@world.std.com
- (Charles M Richmond) writes:
-
- >........... A person can be pro-nuclear energy and still be against this
- >transfer by ship with one 3 gun escort cutter , without even considering
- >the normal hazards of the oceans. Remember this is not one shipment, it is
- >many, the watchfulness and carefulness will only decrease with each success.
-
- I have to admit that the nuclear industry gets more complacent as time
- passes by and every decade, there seems to to be a wake up call that
- reminds us that we are human and prone to err.
-
- However, to debate (or flame ;-)) Mr. Hughes's statements:
-
- (a) Even if the ship sank, the casket is really tough and well designed.
- The designers hurl these things over sheer high cliffs, ram them against
- walls using rocket sleds, etc.
-
- (b) Hi-jacking means you need to sneek up on the ship. And the only way
- is use a fast quiet sub. But then the terrorist(s) will have to
- deal with the US navy sub(s).
-
- (c) Fast breeder programs have difficulty passing the rule of "No
- positive void coefficients" and they have problems with reliable molten
- sodium to water heat exchangers. But breeding or high conversion of
- U-238 to Pu-239 can be achieved in LWR's (i.e. "slow" reactors) using
- skewed thermal neutron flux as opposed to "fast" neutron flux. Pu can
- also be used as mixed-oxide fuel. France has used MOX for 8 to 10 years.
-
- (d) Incorrect. Japan has never exposed it's public to radioactivity
- releases due to reactor accidents. They have had operational incidents
- which have led to scrams and emergency core cooling system activation,
- but the safety systems worked as designed.
-
- Because of the cost of electricity, the reason why unplanned shutdowns
- are bad us because a utility loses the earning potential of about $1.5 million
- per day for each 1GWe plant that's not up and running.
-
- Shinpainaide kudasai.
-
- Jaa, James
- =======================================================================
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