More than a few screws loose at Indian Point nuke plant

31 03 2016

oldNPPsmIndian Point Nuclear Power Station: Missing Bolts and Bars in Pressure Vessel Internals (Baffle-Former Bolts);

Could Cause Fuel Failure; Block Cooling

According to the US NRC, during planned inspection of Indian Point Nuclear Power Station “Entergy identified baffle/former bolts with either visual anomalies or ultrasonic indications. All vessel internal examinations have been successfully completed with no anomalies other than the baffle/former bolts.”

. . . . Although there were “only” 11% damaged, the damage maybe concentrated because loss of one bolt could increase stresses in the surrounding areas. Thus, one suspects that there may have been plate failure or almost failure.  Apparently, even without total failure it can cause serious damage to the fuel rods, as explained below. The document below suggests that a failure could block coolant, as well. . . . (more)

Mining Awareness +

According to the US NRC, during planned inspection of Indian Point Nuclear Power Station “Entergy identified baffle/former bolts with either visual anomalies or ultrasonic indications. All vessel internal examinations have been successfully completed with no anomalies other than the baffle/former bolts.http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2016/20160330en.html

Entergy offered more details in a Press Release: “Engineers identified missing bolts, and bars meant to hold them in place, and other degradation requiring replacement of the bolts. Each bolt, about two inches long and made of stainless steel, holds plate inserts together inside the reactor.http://www.prnewswire.com/news-releases/hundreds-of-inspections-completed-on-indian-point-unit-2-replacement-of-reactor-liner-bolts-planned-300242845.html
Core baffle diagram US NRC
There are many bolts because there are many plates. Although there were “only” 11% damaged, the damage maybe concentrated because loss of one bolt could increase stresses in the surrounding areas. Thus, one suspects that there may have been plate failure or almost failure. [1] Apparently, even without total failure it can cause serious damage to the…

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7 responses

31 03 2016
miningawareness

I can’t believe they actually even wrote in a press release on the 29th that they approved burial of foreign plutonium at WIPP! I had had to add two and two. One document said that foreign non-US origin would be buried with US waste. An earlier document written by Thom Mason said US Pu should all be crammed into WIPP. I don’t know how Tom Clements of Savannah River Site Watch found the press releases. I can’t find them except on his site. He must have gotten a copy or they emailed him: https://miningawareness.wordpress.com/2016/03/31/treasonous-nuclear-security-hoax-us-to-bury-foreign-plutonium-at-wipp-site-in-new-mexico-formally-approved-import-of-more-foreign-waste-may-be-negotiated-today-tomorrow-under-pretense-of-nuclear/

31 03 2016
flyingcuttlefish

posting ….

1 04 2016
flyingcuttlefish

Nuke Pro – The NRC Tells USA Citizens to Eff Off and Just Absorb the Risk and Radiation
http://nukeprofessional.blogspot.com/2016/03/the-nrc-tells-usa-citizens-to-eff-off.html

Where the Mark 1 design reactors in USA are –
https://flyingcuttlefish.wordpress.com/2011/03/17/where-nuke-plants-identical-to-fukushima-daiichi-are-in-the-usa/

6 04 2016
miningawareness

Even Mark III are bad. They are at Riverbend and Grand Gulf. They have a thing to burn off the hydrogen which sounds frightening. The containment is still inadequate.

6 04 2016
flyingcuttlefish

OT / skull n bones at the end part of this

6 04 2016
flyingcuttlefish

2014 NRC doc on the 27 dry fuel storage casks for SPFs added.
http://pbadupws.nrc.gov/docs/ML1433/ML14337A092.pdf

7 04 2016
flyingcuttlefish

some more on HOLTEC (storage canister makers) sent in:

Oscar Shirani called the 1/2 inch thick canisters garbage cans ca 2000. He died of brain cancer.

The things are huge like two or three people tall and wide and so clearly 1/2 inch sealed canister is too thin. They put an outer shell with vents that is thicker.
Donna Gilmore has a lot: http://sanonofresafety.org

However, the German ones she promotes are very bad too. While they are very thick the material quality isn’t good so they could crack straight through (like the titanic). Still probably they are safer. They need to be good quality and thicker than 1/2 inch but too thick can be worse, at least if it’s not a good quality material. And, they need to have leak monitors which she discusses.

Every few months Holtec puts in a request to further reduce the safety of the casks in all different ways, many of which are technical. The theme seems to be to do production quickly with no quality control-quality reduction, packing broken fuel rods. Much has turned around the baskets which hold the fuel.

One of his latest tricks (deadline April 13) is to add Manganese to the outer shell (it is concrete with a metal cover.) The motive must be so he doesn’t have to check quality and allows a range of Manganese. At the low amounts adding manganese means that a hammer can shatter it (says wiki). At much much higher amounts manganese helps. I asked an expert who was unable to tell me off the top of his head. I had to look it up, as usual.

Someone recently came up with what I had suspected that aluminum shouldn’t be used for baskets at all. Now I can’t recall who or where I read it. Japan is no longer using aluminum.

For Holtec the aluminium was mixed with borate (metamic). The borate is supposed to block neutrons and kill off any reactions. He wanted to reduce the borate amount or the quality tests for it so you are left with the badness of aluminum (read about lasagna cells) and less borate to protect.

For the German casks the maker is an old Nazi company as I had suspected. They are located next to a recycled nuclear metals facility. I am convinced they must put those metals in the casks. The nuclear metals can NOT be recycled because the metal must be consistent. I think that AREVA was using recycled metal from Industeel (Arcelor Mittal) and Holtec may be too from Mittal. The German cask maker was caught up in the German nuclear waste scandal of the 1980s.

Recycled nuclear metals-DU was approved for use in those small metal drums. Ecologically this is good except they won’t hold up and make things more complicated except DU might help strengthen-act like lead.

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