Definition and means of maintaining the process vacuum liquid detection interlock systems portion of the PFP safety envelope

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Description

The HC-4, HC-7, HC-227s and the tank 50 High Level Liquid detection interlock systems detect the potential for a liquid up take into the 26 inch Vacuum Headers. All of the detectors are well upstream of the 26 inch Vacuum Liquid Detection system that is designed to prevent a criticality due to liquid uptake. Failure of any of the four glovebox liquid detection systems would not impact the operation of the 26 inch Vacuum Liquid Detection system. The systems are completely separate. The liquid detectors and interlocks were installed after an incident in HC-227s resulted in a significant volume of ... continued below

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26 pages

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THOMAS, R.J. September 1, 1999.

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Description

The HC-4, HC-7, HC-227s and the tank 50 High Level Liquid detection interlock systems detect the potential for a liquid up take into the 26 inch Vacuum Headers. All of the detectors are well upstream of the 26 inch Vacuum Liquid Detection system that is designed to prevent a criticality due to liquid uptake. Failure of any of the four glovebox liquid detection systems would not impact the operation of the 26 inch Vacuum Liquid Detection system. The systems are completely separate. The liquid detectors and interlocks were installed after an incident in HC-227s resulted in a significant volume of RMC feed grade plutonium solution to be drawn out of the glovebox and into the vacuum header. The vacuum trap liquid detection interlock system operability is verified by a weekly functional test per maintenance procedure 2222124. Removal of the HC-7 Liquid Detection Interlock system from the WHC-SD-CP-SDD-013 document will not impact this maintenance procedure.

Physical Description

26 pages

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INIS; OSTI as DE00798079

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  • Other Information: PBD: 1 Sep 1999

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  • Report No.: HNF-SD-CP-SDD-013, Rev.3
  • Grant Number: AC06-96RL13200
  • DOI: 10.2172/798079 | External Link
  • Office of Scientific & Technical Information Report Number: 798079
  • Archival Resource Key: ark:/67531/metadc735173

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1999

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 20, 2017, 8:04 p.m.

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THOMAS, R.J. Definition and means of maintaining the process vacuum liquid detection interlock systems portion of the PFP safety envelope, report, September 1, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc735173/: accessed January 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.