LEPRICON analysis of pressure vessel surveillance dosimetry inserted into H. B. Robinson-2 during cycle 9

Technical Report · Fri Aug 01 04:00:00 EDT 1986

OSTI ID:5156736

Maerker, R E

A second example of applying the LEPRICON methodology to an existing pressurized water reactor is described. The present application is an analysis of ad hoc dosimetry inserted into the HB Robinson-2 reactor to monitor the effects on pressure vessel fluence produced by the introduction of a low-leakage fuel management scheme during cycle 9. The use of simultaneous dosimetry both at a downcomer location and in the reactor cavity allowed a quantitative evaluation to be made by the LEPRICON procedure of the relative merits of each location. Unfolded results using the dosimetry indicate that the cumulative neutron fluence above 1 MeV originally calculated for the critical lower circumferential weld in the pressure vessel during cycle 9, 7.2 x 10/sup 17/n/cm/sup 2/+-15.9 percent, should be adjusted upward by about one standard deviation to a value of 8.8 x 10/sup 17/n/cm/sup 2/ with a reduced uncertainty of 10.9 percent.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5156736
• Report Number(s): NUREG/CR-4439; ORNL/TM-10132; ON: TI86014633
• Country of Publication: United States
• Language: English

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