Reactor 5 pool without coolant system leaked its coolant water

Photo : Leaked SFP 5 water before pumped up.


According to Tepco, SFP 5 (Reactor5 Spent Fuel Pool) leaked its coolant water on 7/19/2014.


Unidentified water was found in 2 locations, where the coolant system valves are installed.

The Cobalt-60 density was 2,100,000 ~ 3,400,000 Bq/m3, which is the same as SFP 5 water. Tepco admitted the pool water leaked to the environment.

Tepco states the leaked volume was only 0.1 m3. Tepco cleaned the leaking area but the cause is not verified yet.


As Fukushima Diary has been reporting before (cf. Reactor 5 pool coolant system won’t get back on until August [URL]), SFP 5 still hasn’t got the coolant system back on.

Tepco is directing the “reactor’s” coolant system to the spent fuel pool occasionally.


At this moment, SFP 5 is out of coolant system and it’s even leaking the water outside for unidentified reason.


↓ Leaked SFP 5 water after pumped up

2 Reactor 5 pool without coolant system leaked its coolant water



You read this now because we’ve been surviving until today.


Français :

La piscine du réacteur 5 qui n’est plus refroidie par son système fuit son eau de refroidissement

Photo : Liquide de la SFP5 avant pompage.


Selon Tepco, le 19 juillet 2014, la SFP5 (piscine à combustibles usagés du réacteur 5) a une fuite de son liquide de refroidissement.

De l’eau d’origine inconnue a été trouvée en 2 endroits où l’on trouve des vannes du système de refroidissement.
La radioactivité en cobalt 60 y est entre 2,1 et 3,4 millions de Bq/m³, égale à celle de l’eau de la SFP5. Tepco a reconnu que l’eau de la piscine fuit dans l’environnement. Tepco affirme que le volume de la fuite n’est que de 1/10e de m³ (= 1 Hl = 100 L).
Tepco a nettoyé la zone mais l’origine de la fuite n’est pas encore établie.

Comme le Fukushima Diary l’a déjà rapporté (cf. Le système de refroidissement de la piscine du réacteur 5 ne sera pas réparé avant août), le système de refroidissement de la SFP5 n’est toujours pas réparé. Tepco dévie provisoirement le système de refroidissement du réacteur lui-même vers sa piscine.

Pour l’instant, la SFP5 n’a pas de système de refroidissement et même elle fuit son liquide de refroidissement sans raison connue.

↓ liquide de la SFP5 après pompage
2 Reactor 5 pool without coolant system leaked its coolant water

Vous pouvez lire ceci parce que nous avons survécu jusqu’à aujourd’hui.

About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


July 2014