Japan Plans To Scrap Nuclear Plants After 40 Years

An anonymous reader writes with this news as carried by the San Francisco Chronicle: "After the nuclear meltdown of the Fukushima plant, 'Japan says it will soon require atomic reactors to be shut down after 40 years of use to improve safety.' If, however, a nuclear plant is deemed still safe it may continue operation."

Comments

if it ain't broke

[alphatel]

I promised my neighbors I will stop burning cow dung after 10 years, unless I deem it doesn't still smell like sh*t.

Re:if it ain't broke

[quantaman]

You're missing the point.

Older plants don't have as many safety features as newer plants, as well existing safety features may degrade as they age. So instead of plants simply getting older and less safe they're proactively saying "this plant will be shut down by X unless you can prove it's still safe enough to continue".

In Other Words...

[CrazyDuke]

Japan will continue to use nuclear plants after 40 years after some political/financial lubrication and rubber stamping a safety report, just like every other first world nation with old plants in the news lately.

War is peace; Freedom is slavery, etc...

Mmm...chocolate rations...

Re:In Other Words...

[lightknight]

Indeed. It's our weird world of thinking -> "We won't build new nuclear power plants (which are safer, and benefit from technology advances), because nuclear power is unsafe; but we will continue to operate the older nuclear power plants (which are less safe, and are slowly crumbling) because we have already spent the money building them."

There are days when I think the inmates are running the asylum.

Re:So, no change?

[Anonymous Coward]

No, it means that now, a plant has to be shown to be unsafe to be shutdown. With the changes, a plant has to be shown to be safe to qualify for an extention. It basically means more inspections.

OTOH...

[msauve]

will soon require atomic reactors to be shut down after 40 years of use to improve safety.' If, however, a nuclear plant is deemed still safe it may continue operation."

That also implies that if a plant is unsafe, it still gets 40 years. Otherwise, what does the time limit mean? At the end of 40 years, a plant is either safe or unsafe. If safe, they can keep going. If unsafe, why was it still running?

Re:OTOH...

[suomynonAyletamitlU]

That also implies that if a plant is unsafe, it still gets 40 years. Otherwise, what does the time limit mean?

It means that they expect plants to be worn down by use. Plants that are less worn are deemed less likely to be a problem, even if they have fewer safeguards. Plants that are both worn and with fewer safeguards will (ostensibly) not be tolerated.

Re:OTOH...

[VanGarrett]

Do you believe that a nuclear plant goes into operation immediately when the last construction worker on-site finishes his final designated task? That seems a bizarre way to run things, in any country. The nuclear plant is inspected prior to commencing operations, and is presumed safe until its next inspection. Can you know before the box is open, whether Schrodinger's cat remains alive? This is not a new thought-experiment.

The decision that Japan has made, is that 40 years is a reasonable length of time to check in on a nuclear plant, to see if it still meets current safety standards. It may no longer meet standards because of normal wear and tear on the facility, or it may be because the standards have been raised. Seeing as the previous modus operandi was to build a nuclear plant and let it continue until it explodes, I'd say that this is a clear and marked improvement.

Re:OTOH...

[quantaman]

will soon require atomic reactors to be shut down after 40 years of use to improve safety.' If, however, a nuclear plant is deemed still safe it may continue operation."

That also implies that if a plant is unsafe, it still gets 40 years. Otherwise, what does the time limit mean? At the end of 40 years, a plant is either safe or unsafe. If safe, they can keep going. If unsafe, why was it still running?

People like you are why I always feel the need to write long pedantic posts :/

First lets establish the obvious in that safety isn't a binary condition, it's a continuum.

Now older plants are less safe for two reasons. 1) they were built when the technology was less advanced, 2) they are old.

Now if a plant is unsafe enough it will obviously be shut down before the 40 year mark, the only reason to believe otherwise is if you're being deliberately obtuse.

However, we're looking at the situation where a plant is safe enough that there's no immediate reason to shut it down, but if someone started the ball rolling and did a really tough safety inspection it might end in the plant being shut down.

What this law does is start the ball rolling.

I'm sorry to sound snippy but comments of the type "I'm going to misinterpret a statement so I can make a clever remark" really bug me and detract from the discussion.

Re:OTOH...

[Surt]

Right .....
And, of course, Fukushima was less than 3 months over 40. If the tidal wave had been 3 months earlier, everything would have been fine?

I remember reading Asimov's 'Foundation'

[Anonymous Coward]

I remember reading Asimov's 'Foundation'; where people after colonising the whole galaxy, fell into lackluster apathy and gave up on their knowlege of science, abandoning nuclear energy in favour of combusting carbon based fuels. I'm glad Asimov's not alive to see the day when the human race lives up to the end of days scenario he thought so terrible before even touching the stars.