Talk:Three Mile Island accident

message: https://www.pennlive.com/news/2018/09/three_mile_island_closure_loom.html gives the closure date as September 20, 2019, but notes attempts to postpone this... community support for it to stay open for obvious local economic benefits (ie jobs), and environmental concerns of its replacement by fossil fuel. Some other news:
* https://www.bloomberg.com/news/features/2018-06-05/a-meltdown-didn-t-kill-three-mile-island-but-shale-probably-will
* https://www.pennlive.com/news/2018/10/nuclear_safety_advocates_call.html
* https://www.pennlive.com/news/2018/09/three_mile_island_closure_loom.html
* https://www.pennlive.com/politics/index.ssf/2018/05/one_year_later_officials_still.html confirms September 2019 but not the actual date
Article just needs an update... I'll do it when I find time but feel free to help! Andrewa (talk) 23:38, 21 February 2019 (UTC)
thread_title:  Closure date 

message: The whole section "Lessons learned" is about the personal opinion of some Charles Perrow. The assertion of Perrow that the accident was "unexpected, incomprehensible, uncontrollable and unavoidable" is falsified by the facts stated in the introduction of the page about "ambiguous control room indicators". Indeed, the lesson learned is that there must be (i) more reliable control room indicators; (ii) more automatic reactions of the system and less reliance on the judgment of the operators. Perrow suggest that such a complex system cannot be improved, which is historically falsified by the improvements made as a lesson learned. --Dominique Meeùs (talk) 18:58, 10 March 2019 (UTC)
thread_title:  Opinion instead of lesson 

message: From Wiki: "Numbers consisting of long sequences of digits can be made more readable by separating them into groups, preferably groups of three, separated by a small space. For this reason, ISO 31-0 specifies that such groups of digits should never be separated by a comma or point, as these are reserved for use as the decimal sign."
:Ummmm, OK.  If there are such "long sequences of digits" in the text, by all means, go ahead and edit them.  Or as for help if for some reason you are unable.  No one here is particularly comma penurious. In fac,t, we often stum,,,,,b,,l across,,, them ... ourselves.  SkoreKeep (talk) 20:13, 30 July 2019 (UTC)
thread_title:  Thousand separators 

message: I am not a wikipedia editor, nor do I know what the titles should be, but I'm relatively sure a header should not read "trans people"  — Preceding unsigned comment added by 2600:1700:3040:31A0:1D54:58D7:84DA:C22D (talk) 02:43, 8 February 2020 (UTC)
replies: text: Thanks, it was a rapidly changing IP. Fixed and blocked. Acroterion (talk) 02:47, 8 February 2020 (UTC)
thread_title:  Someone appears to have changed some titles 

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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for deletion 

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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for speedy deletion 

message: The user https://en.wikipedia.org/wiki/User:Diannaa removed content derived from a PDF in the Nuclear Regulatory Commission's publicly available document database. That document is therefore considered public domain and free for all to use. The content should be restored. NRC OPA (talk) 17:43, 30 June 2022 (UTC)
thread_title:  Removal of public domain information 

message: The day of the accident Ron Fountain entered a high radiation environment to unjam a valve of chillwater. The valve was on the 2nd level but the elevator wasn't working. He ran causing him to hyperventilate. Fountain received the most REMs of any worker.
 Kevinfountain (talk) 08:12, 18 July 2023 (UTC)
replies: text: Yes, what about Houser? The guy who said the sample looked like Alka-Seltzer and showered for 8 hours to be decontaminated? Bucky winter soldier (talk) 13:09, 18 October 2023 (UTC)
thread_title:  No mention of any of the workers. 

message: NUREG 0600 is a better source than many of the books used here. It is what I consider a primary source
Several items that are mentioned in NUREG 0600, not mentioned here or wrongly stipulated here.
1. The EMOV (PORV) valve was leaking. The leakage was wrongly calculated p(rocedure was wrong) and was more than 1gpm. The NPP was not allowed to be operated longer than 72 hours with a reactor cooling leakage of more than 1 gpm.
2. Because of the leakage the statement that the operator should be able to see the closure of the EMOV by checking the temperatures downstream is  not true. This temperature was way up while normal 'closed'. After closure it would take 10 minutes before the valves  (Fail safe valves in front of EMOV) would go back to normal temperature, but the EMOV valve remained higher in temperature for more than 40 minutes in case of a normal closure. Typically the EMOV should have been opened for only 31 seconds. Even without leakage it would have taken a lot more time to discover that the EMOV was still open. [Outside comment: PORV probably was leaking because it was beaten to crap by water droplets in previous openings ]2603:7000:4DF0:9340:9151:1EBF:5994:3533 (talk)BG
3. The temperatures were used to determine that the EMOV was open, and this the reason that the operators closed the EMOV finally after 80 minutes. Only because these temperature should be dropped by now.
4. TMI-2 Did receive NRC report on Besse incident (10 copies) but training staff didn't use it.
5. Training staff considered the idea that pressure could drop and   pressurizer could fill as something that could never happen. So it was never trained to the staff. In such case the pressurizer level was considered focus.
6. Operators consider the response of the reactor to a turbine trip as severe. So it was common that ES were activated, and also common to shut them down. The ES activation, the failure of the rupture disc, the radiation alarm,  even high - all these had happened before so none of them was sufficient to raise an alarm. (literally fromn NUREG 0600)
Actually, only the continuous running of the sump pumps could have triggered an early indication that reactor coolant was being lost 
7. In case of power failure, the EMOV would stay open. This was changed after an incident, but this change was not carried out according to procedure. No safety analysis was done afterwards, no training was given to operators. Originally there wasn't even a light indicating that the EMOV was open.
Comment: Thanks. Design didn't consider the consequences of an open EMOV or solid pressurizer. A serious Westinghouse design oversight was made much worse by using a smaller pressurizer. Can't blame the situation on the operators when the designers didn't consider these problems.2603:7000:4EF0:9B0:4526:FA2E:9B0:47A6 (talk)BG
8. The operators were forced to close down the RCS pumps, because the procedure required it. These procedures were written with pump failure /seal failure in mind, and not with the situation that actually occured. So when vibration exceeded the limits, the operators had to change to HPInjection cooling of the core.
 
This list is not even complete. Blackbird69b (talk) 08:45, 17 October 2023 (UTC)
thread_title:  Include NUREG 0600 

message: I have just cleared up the sentence about 'their' findings a little. The current sentence and its citations is a mess. Presently it states that RPHP is citing Mangano but neither the article from Mangano in Bulletin of the Atomic Scientists nor the article from The Guardian draws this link - so presently WP:OR. The whole muddled mess of sources risks WP:SYNTH. I have removed the statement of Mangano's credentials that I thought was taking up rather too much space and gave him WP:UNDUE weight.
Overall, I'd say that if editors want to cite Mangano in Bulletin, then cite Mangano in Bulletin and stop beating around the bush with these RPHP people.
All the best, ~ El D. (talk to me) 14:39, 19 December 2023 (UTC)
thread_title:  Joseph Mangano and the Radiation and Public Health Project (RPHP)