At 1945 Point Beach declared a UE based on
HU 3.1, 'Report or detection of toxic or flammable gases that has or could enter the site area boundary in amounts that can affect NORMAL PLANT OPERATIONS.'
This Emergency Action Level (EAL) was entered based on a confirmed Sodium Hypochlorite tank leak to the tanks diked area. The leak is located below the current tank level and will continue to drain to the dike until equilibrium level is reached. The dike is designed to contain the entire tank contents. There are no signs of any leakage outside of the dike. The vapors in the immediate area are not significant at this time and extra ventilation has been provided by opening an overhead roll up door in the area. The NRC Senior Resident Inspector has been notified.
The sodium hypochlorite is used in the screen house to chlorinate the service water and circulating water systems to eliminate Zebra Mussels. The concrete diked area is designed to contain the entire contents of the tank.
- * * UPDATE AT 0831EDT ON 7/4/08 FROM KILE HESS TO S. SANDIN * * *
At 0646 [CDT] on 7/4/08 Point Beach terminated the UE that was declared at 1945 CDT on 7/3/08, based on HU 3.1. The leaking Sodium Hypochlorite tank and leak control dike have been drained and the over flow leak control area cleaned. The hazard no longer exists and the area has been released to normal access.
The licensee informed State and local agencies and the NRC Resident Inspector. Notified R3DO (Kozak),
EO (Brown),
IRD (Gott),
FEMA (Canupp) and DEHS (Inzer).
