ML102700539
| ML102700539 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 09/17/2010 |
| From: | - No Known Affiliation |
| To: | NRC/FSME |
| References | |
| Download: ML102700539 (6) | |
Text
Scan Action Limits (ALs): Rock Wool Insulation Radionuclide Waste Limita Scan Action Levelb (pCi/g) (dpm/100 cm 2)Cs-137 15.0 1,400 Co-60 5.0 480 Sr-90 1.0 95 Eu-152 1.0 95 Eu-154 1.0 95 Ag-108m 0.1 10 aValue from Table 1 in PG&E Letter HBL-10-003.
bValue based on mass-weighted density assuming 98% rock wool insulation and 2%asbestos-cement sheet. Value shown has been rounded down to 2 significant digits.Relative Fractionsa:
Radionuclide-of-Concern Average (pCi/g) Relative Fraction Cs-1 37 7.96 0.9583 Co-60 0.350.0417 aBased on positive Cs-1 37 and Co-60 results for samples collected from Units 1 and 2, as reported in Table 4-7 in Radiological Characterization Report, Humboldt Bay Power Plant [ref j.The gross activity limit for scans was determined through the application of MARSSIM equation 4-4" Gross activity scan limit = 1/7(fl/limitl+
f 2/limit 2 + .... fn/limitn)
For the Cs-Co mix associated with the fuel oil system, the gross activity scan limit is: Gross activity scan limit = 1/Z(0.9583/1,400
+ 0.0417/480)
= 1,296 dpm/1OOcm 2 Scan ALs: Ventilation Radionuclide Waste Limita Scan Action Levelb (pCi/g) (dpm/100 cm 2)Cs-1 37 15.0 44,600 Co-60 5.0 14,800 Sr-90 1.0 2,900 Eu-152 1.0 2,900 Eu-154 1.0 2,900 Ag-108m 0.1 290 aValue from Table 1 in PG&E Letter HBL-10-003.
bValue based on density for aluminum.
Value shown has been rounded down to 2 significant digits.Relative Fractionsa:
Radionuclide-of-Concern Average (pCi/g) Relative Fraction Cs-1 37 7.96 0.9583 Co-60 0.35 0.0417 aBased on positive Cs-1 37 and Co-60 results for samples collected from Units 1 and 2, as reported in Table 4-7 in Radiological Characterization Report, Humboldt Bay Power Plant [ref j.The gross activity limit for scans was determined through the application of MARSSIM equation 4-4" Gross activity scan limit = 1/7(fl/limitl+
f 2/limit 2 + .... fn/limitn)
For the Cs-Co mix associated with the fuel oil system, the gross activity scan limit is: Gross activity scan limit = 1/Z(0.9583/44,600
+ 0.0417/14,800)
= 41,145 dpm/1OOcm 2 Scan ALs: Steel Radionuclide Waste Limita Scan Action Levelb (pCi/g) (dpm/100 cm 2)Cs-137 15.0 130,000 Co-60 5.0 44,000 Sr-90 1.0 8,800 Eu-152 1.0 8,800 Eu-154 1.0 8,800 Ag-108m 0.1 880 aValue from Table 1 in PG&E Letter HBL-10-003.
bValue based on density of iron. Value shown has been rounded down to 2 significant digits.Relative Fractionsa:
Radionuclide-of-Concern Average (pCi/g) Relative Fraction Cs-1 37 7.96 0.9583 Co-60 0.35 0.0417 aBased on positive Cs-137 and Co-60 results for samples collected from Units 1 and 2, as reported in Table 4-7 in Radiological Characterization Report, Humboldt Bay Power Plant [ref j.The gross activity limit for scans was determined through the application of MARSSIM equation 4-4" Gross activity scan limit = 1/y(fl/limitl+
f 2/limit 2 + .... fn/limitn)
For the Cs-Co mix associated with the fuel oil system, the gross activity scan limit is: Gross activity scan limit = 1/Z(0.9583/130,000
+ 0.0417/44,000)
= 120,169 dpm/1OOcm 2 Scan ALs: DAW Radionuclide Waste Limita Scan Action Level" (pCi/g) (dpm/100 cm 2)Cs-137 15.0 14,000 Co-60 5.0 4,900 Sr-90 1.0 990 Eu-152 1.0 990 Eu-154 1.0 990 Ag-108m 0.1 90 aValue from Table 1 in PG&E Letter HBL-1 0-003.bValue based on assigned density equal to 55 lbs per cubic foot (PG&E Letter HBL-1 0-0030. Value shown has been rounded down to 2 significant digits.Relative Fractionsa:
Radionuclide-of-Concern Average (pCi/g) Relative Fraction Cs-137 7.96 0.9583 Co-60 0.35 0.0417 aBased on positive Cs-1 37 and Co-60 results for samples collected from Units 1 and 2, as reported in Table 4-7 in Radiological Characterization Report, Humboldt Bay Power Plant [ref j.The gross activity limit for scans was determined through the application of MARSSIM equation 4-4" Gross activity scan limit = 1/y(fl/limitl+
f 2/limit 2 + .... fn/limitn)
For the Cs-Co mix associated with the fuel oil system, the gross activity scan limit is: Gross activity scan limit = 1/Z(0.9583/14,000
+ 0.0417/4,900)
= 12,990 dpm/1OOcm 2
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