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Comment by BeastMachine | Hacker News Reader

I'm an advocate for nuclear power but it seems ridiculous that this warning was given 20 years after the initial find.

I understand that nuclear facilities are not like regular buildings and require more logistics for repairs but there's no way it would require 20 years.

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The way I understood it was inspections have always been done. The original cracks were repaired. New ones did not show up until 2022.

That's not my understanding from reading the linked article and one linked from it.

From: https://www.thestate.com/news/local/environment/article28022...

> The NRC, which rarely issues yellow findings, said nuclear plant operators did not resolve cracking problems from 2003 to 2022 in V.C. Summer’s diesel generator system, one of the most important backup safety systems at an atomic power plant.

which links to: https://www.thestate.com/news/local/environment/article27928...

> Federal nuclear safety officials made a discovery that was perhaps more unsettling than the problem from 2022. They identified a pattern of cracks and leaks in the plant’s emergency generator system going back 20 years. On five different occasions since 2003, the power company has been forced to repair cracks in the emergency diesel generator system, according to an agency inspection report released in August. Diesel oil leaks have focused attention on why VC Summer plant operators did not resolve the cracking problems — and how that might have affected the company’s ability to prevent a radiation leak if an emergency occurred. Officials with the Nuclear Regulatory Commission say they are concerned because the problems keep recurring. Few other nuclear plants in the Southeast have had the same number of cracking problems in diesel generator systems, say officials in the agency’s Atlanta office.

We would need to assume that each of those events was spread out over the entirety of the 20 years. All 5 occasions could have happened between 2003 and 2007, and fifteen years passed before the next. Each time the cracks were repaired.

Without a true timeline of events, its hard to say for sure.

"In this case, officials at the V.C. Summer plant learned about cracks in fuel pipes in the facility’s diesel generator system in 2003. Utility workers fixed the initial crack, as well as other cracks four different times in the years after the initial work was done. But the NRC says the utility never adequately assessed what could be done to make sure the diesel piping system did not experience more cracking. The most recent cracks were identified in November 2022 during a 24-hour test of the system. Workers found a small leak on one of two diesel generator systems. The leak increased over time and workers discovered a 140-degree crack around a pipe, records show."

So they found cracks first in 2003, and fixed them. They found more cracks over the years and fixed them... what they have failed to do is to stop the cracking from occurring in the first place. That failure led to an even bigger crack happening during a test run of the system. According to Dominion, they plan to build a new pipe, which should fix this. The NRC seems to think they should have done this sooner, and the NRC is likely right, but I am no expert in these things.

It probably should also result in a much more throughout inspection of the plant to ensure that there are no other issues. Again, I have no expertise here.

Agreed overall. That specifically contradict's GP's upthread understanding of "The original cracks were repaired. New ones did not show up until 2022."

> not like regular buildings and require more logistics for repairs but there's no way it would require 20 years.

tldr; regulatory processes prevent improvements.

I work in a highly regulated industry though not nuclear. There are obvious things to change which were approved in the site plans decades ago. Those nonsensical systems must be maintained because if they stop working for a small number of hours, everything must be stopped and there will be fines. It won't be changed because doing so requires asking regulator for approval and then everybody and their uncle gets to make a comment and even sue to stop it. Regulatory process hinders obvious good changes and improvements.

BTW, this is similar to how Los Angeles squeezed out good paying manufacturing jobs three decades ago - make it near-impossible to get electrical permit to change anything.

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