8 octobre 2013
Suite à son arrêt pour maintenance, une seconde tentative de démarrage du réacteur de Oyster Creek a échoué. Lors de ce second démarrage, une perte de vide au condenseur a été détectée et le réacteur a été mis manuellement à l’arrêt. Un trou de 2,5 cm a été découvert dans un joint de dilatation sur la tuyauterie d’une soupape de décharge.
Type : BWR Mark I (type Fukushima 1) - P : 1 920 MWth - Première divergence : mai 1969
Available in english only.
Oct. 8, 2013
A second attempt to restart the Oyster Creek power plant was canceled Sunday when plant operators detected a loss of vacuum in the plant’s main condenser, Nuclear Regulatory Commission officials said Monday.
Workers troubleshooting the problem traced it to a 1-inch hole in an expansion joint on piping from a relief valve for a reheater connected to the plant’s main steam condenser, said Neil Sheehan, a spokesman for the NRC.
The condenser is operated in a vacuum condition to maximize heat transfer and efficiency, and the leak allowed air infiltrating into the system to lower that vacuum pressure as operators were powering up the reactor.
At 11:30 a.m. they noticed the pressure drop and manually shut down the reactor, Sheehan said.
It had been operating at 20 percent power, still well below the 30 percent level when the plant synchronizes with the electrical grid and begins sending power out.
It was the second attempt by plant owner Exelon to bring the station back online after its recent maintenance outage.
An attempt Thursday ended when power level sensors in the reactor sent erratic signals, triggering an automatic shutdown.
Kirk Moore : 609-709-5036 ; kmoore@ njpressmedia.com
La boutique
Informez vous