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Area 600 uses a flammable gas as part of i … Area 600 uses a flammable gas as part of its operation. IROFS FIRE6-6 is a control that prevents the flammable gas from exiting the main process equipment and being released into an attached glovebox. FIRE6-6 makes use of a dual door system, only one door is allowed to be open at a time and the chamber between the doors is purged. The accident scenario of concern is release of the flammable gas into the glovebox and an explosion in the building. IROFS FIRE6-8, 6-1 and 6-9 ensure an inert gas purge occurs prior to opening the main process equipment to the glovebox and are also credited as IROFS.</br>The equipment associated with FIRE6-6 is designated as Safety Related Equipment (SRE) and is functionally tested annually. The test was performed on October 21, 2008. The test failed because when one door was open, the 2nd door opened slightly (approx 1 inch). Though there are mitigating factors such as potential dilution of the flammable gas through the glovebox ventilation system, it was determined that IROFS FIRE6-6 was degraded and that the performance criteria of 10CFR70.61 were not met.</br>The event occurred due to a degraded IROFS that was discovered during a periodic functional test. Initial investigation indicates that a failed position switch is the cause. (The potential health and safety consequences are) a potential explosion in a glovebox and release of radiological material and exposure to the worker. No actual explosion or radiological exposure occurred.</br>Discussed situation with Safety management and with NRC Resident Inspector. Operations has locked out the flammable gas supply on Area 600 until the equipment associated with FIRE6-6 is fixed and the SRE test passes. FIRE6-6 is fixed and the SRE test passes. +
17:02:00, 21 October 2008 +
44,584 +
17:06:00, 21 October 2008 +
17:02:00, 21 October 2008 +
Area 600 uses a flammable gas as part of i … Area 600 uses a flammable gas as part of its operation. IROFS FIRE6-6 is a control that prevents the flammable gas from exiting the main process equipment and being released into an attached glovebox. FIRE6-6 makes use of a dual door system, only one door is allowed to be open at a time and the chamber between the doors is purged. The accident scenario of concern is release of the flammable gas into the glovebox and an explosion in the building. IROFS FIRE6-8, 6-1 and 6-9 ensure an inert gas purge occurs prior to opening the main process equipment to the glovebox and are also credited as IROFS.</br>The equipment associated with FIRE6-6 is designated as Safety Related Equipment (SRE) and is functionally tested annually. The test was performed on October 21, 2008. The test failed because when one door was open, the 2nd door opened slightly (approx 1 inch). Though there are mitigating factors such as potential dilution of the flammable gas through the glovebox ventilation system, it was determined that IROFS FIRE6-6 was degraded and that the performance criteria of 10CFR70.61 were not met.</br>The event occurred due to a degraded IROFS that was discovered during a periodic functional test. Initial investigation indicates that a failed position switch is the cause. (The potential health and safety consequences are) a potential explosion in a glovebox and release of radiological material and exposure to the worker. No actual explosion or radiological exposure occurred.</br>Discussed situation with Safety management and with NRC Resident Inspector. Operations has locked out the flammable gas supply on Area 600 until the equipment associated with FIRE6-6 is fixed and the SRE test passes. FIRE6-6 is fixed and the SRE test passes. +
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00:00:00, 22 October 2008 +
SNM-124 +
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23:28:11, 24 November 2018 +
17:06:00, 21 October 2008 +
0.00292 d (0.07 hours, 4.166667e-4 weeks, 9.5886e-5 months) +
17:02:00, 21 October 2008 +
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