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ISFSI Environmental Monitoring at SONGS. San Onofre Nuclear Generating Station. Overview of SONGS ISFSI. ISFSI CAB. SONGS 1 mile radius. Annual Duplicate TLD. Quarterly Duplicate. Comparison of TLD data to PIC data. TLD data vs known radiological conditions.

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Tld data vs known radiological conditions
TLD data vs known radiological conditions

  • Data from Unit 1 reactor vessel removal

  • East side of ISFSI vs West side

  • Data from known radiological events


Transit dose
Transit Dose

  • Need to correct for transit dose if shipping TLDs offsite

  • Need to carefully select shipping vendor

  • Packing Geometry may become most significant factor in the TLD data


Lessons learned
Lessons Learned

  • It’s never too early to start preoperational data acquisition

  • Pre-operational data may be more relevant than control data when estimating dose attributable to operation

  • Carefully monitor transit dose if shipping TLDs offsite

  • Use PICs and duplicates for QA


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