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Discusses evaluation of failure of sluggish shutter mechanism on two Ciba-Geigy source housings.Amends need to be submitted to certificates of registration to reflect use of mechanisms.

Accession Number: ML20114D868

Date Released: Sunday, October 27, 2024

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• ML20114D867 - Discusses evaluation of failure of sluggish shutter mechanism on two Ciba-Geigy source housings.Amends need to be submitted to certificates of registration to reflect use of mechanisms. (3 page(s), 8/10/1992)
• ML20114D871 - Advises of customer notification on 910920 of broken shutter mechanism.Licensee wants to leave source in 150 mCi Co-60 shield & requests NRC concurrence. (2 page(s), 10/9/1991)
• ML20114D875 - Provides addl info on Boise Cascade problem initially provided to NRC on 811009.Source used w/LB-313 point level sys.Surveys made after installation of source into shield & after shield installed into bin. (2 page(s), 8/10/1992)
• ML20114D877 - Discusses improper installation of 150 mCi Co-60 source into LB-7442 gauge.All svc personnel instructed on source installations & updated device registration of APGEE handed out to all personnel. (1 page(s), 12/16/1991)
• ML20114D879 - Advises that licensee does not wish to amend registration to have LB-7442 accept 150 mCi source.Requests special consideration on job & to leave 150 mCi source in LB-7442 Boise Cascade for listed reasons. (1 page(s), 11/26/1991)