Re: what is the hardest oil change you ever did?

Posted by buickanddeere on December 31, 2003 at 07:24:07 from (192.75.48.3):

In Reply to: what is the hardest oil change you ever did? posted by Jay on December 29, 2003 at 15:47:40:

The lube oil for the upper and lower bearings above the mechanical seal on a 1900 HP 3450 rpm 4KV heat transport motor in the reactor building. 128 of them in the entire plant.
1st you get in through the gate with the vehicle security pass, empty your pockets and get your lunch x-rayed while a bomb sniffer booth checks your person. Get frisked with a wand if anything alarms. Go to change room and strip out of civies and into radiation underwear and overalls. Get pre-job briefing from senior tech. Check personal dose accumulation then tritium and gamma levels in boiler room. Besides regular TLD badge, program a DCD badge, tape on extremity TLD’s to fingers/feet. Get a gamma meter from stores. Get authorized by the Shift Superintendent and the 1st operator. Wait for Holder Of Record to walk the permit isolation points and hang safety lockout padlocks. Meet with the mechanics to enter the reactor building together. Get dressed in plastic suit with ant-contamination overalls on top, safety glasses and hard hat then roll tools through the airlock. Make certain going through the correct airlock into the proper unit, they all look the same. Remove tritium respirator and pull on plastic hood with view window after plugging into breathing air supply. Double check pump identification, there are 16 per unit in two rows and they all look the same. Drain oil and check low alarm float switch inside a confined space, it works fine. Laying on side between cooling lines with head and one arm reaching into pump base. Replace switch under protest anyways as no one can figure out where the alarm is in. Refill with 15 gallons of oil and alarm is still in. Contacts are measured closed on switch. Get prints out and take the six previous work reports with a grain of salt. Go back into reactor building and find one of two wires on the wrong terminal strip location on the motor instrumentation junction box. Some one mixed up referencing A,B,C,D,E,F,G etc to terminals 1,2,3,4,5,”5”,6 etc. Get out of reactor building again, decontaminate tools and check tools and self in monitors again. Put in bioassay for lab to check accumulated internal dose. Put extremity tlds in shielded box for rad control to read again. Go to senior tech and double signature wire identification change for documentation group to investigate. Explain several times to management what was found when where and how, both in person and on a work report.

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