ENS 41972

v t e ENS Event
06:00 Jul 28, 2005
Title	Well Logging Source Lodged Near the Bottom of a 240 Foot Shaft
Event Description	On July 28, 2005, a 100 milliCurie Cs-137 sealed source (New England Nuclear, Model 572, serial number 1623) became lodged near the bottom of a 240 foot shaft The logging probe and source had descended to that depth after breaking loose from the logging cable at the surface of the well. Repeated efforts to retrieve the source failed, Retrieval efforts were discontinued when a 4 foot section of an overshot device twisted off at approximately 210 feet down-hole. The licensee submitted a written description of the event on August 23, 2005 and provided supplemental information on September 1, 2005 and September 2, 2005. Authorization to abandon the well formally approved on September 6, 2005.

ENS 41972 +/-
Where
Layne Christensen Co Colog Div Lakewood, Colorado (NRC Region 4)
License number:	COLO.971-01
Organization:	Colorado Dept Of Health
Reporting

Agreement State
Time - Person (Reporting Time:+990.7 h41.279 days <br />5.897 weeks <br />1.357 months <br />)
Opened:	Fax 12:42 Sep 7, 2005
NRC Officer:	Chauncey Gould
Last Updated:	Sep 7, 2005
41972 - NRC Website
v • d • e

v t e Emergency Notification System
Layne Christensen Co Colog Div with Agreement State
WEEKMONTHYEAR2005-07-28T06:00:00 [Table view]
[ENS list for Layne Christensen Co Colog Div]

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