In
Event Notification 42597 on May 22, 2006 Pilgrim Nuclear Power Station notified the NRC that during ongoing activities to remove non-fuel material from the Pilgrim Spent Fuel Pool it had been identified that an irradiated neutron detector containing a very small quantity (less than 0.003 grams) of
special nuclear material is not in its expected location. Per the inventory sheets the neutron detector should have been enclosed in a 'dry tube' in the Spent Fuel Pool. Processing of the 'dry tube' for shipment identified that the neutron detector is not in its expected location.
There were a total of twelve (12) 'dry tubes' that our records show enclosed neutron detectors. Four (4) of these 'dry tubes' have been processed and a second 'dry tube' in which no neutron detector was stored has been found. This irradiated neutron detector would have contained a very small quantity (less than 0.003 grams) of special nuclear material.
This condition is being conservatively reported under 10CFR74.11. There is no evidence of theft or diversion.
Investigation is continuing.
The licensee notified the NRC Resident Inspector.