ML21055A760

GE Hitachi Nuclear Energy - 2020 GEH Morris Operation Annual Effluent Report

ML21055A760
Person / Time
Site:	07200001
Issue date:	02/24/2021
From:	Mcfadden A GE Hitachi Nuclear Energy
To:	Document Control Desk, Division of Fuel Management, Office of Nuclear Reactor Regulation, NRC/RGN-III
References
M210023
Download: ML21055A760 (2)

Text

GE Hitachi Nuclear Energy

• HITACHI GEH Morris Operation 7555 East Collins Rd Morris, IL 60450 M210023 February 24, 2021 ATTN: Document Control Desk Director, Division of Fuel Management Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Regional Administrator U.S. Nuclear Regulatory Commission, Region Ill 2443 Warrenville Road, Ste 210 Lisle, IL 60532-4352

Subject:

2020 GEH Morris Operation Annual Effluent Report

References:

1) NRC License SNM-2500, Docket 72-01

2) NRC Regulation 10CFR72.44

Dear Sir or Madam,

In accordance with 10CFR72.44(d)(3) and SNM-2500 license condition 8.2.1, this report documents an estimate of quantities of principal radionuclides released to the environment by the GE-Hitachi Morris Operation in 2020. This report also provides an estimate of the maximum potential dose to the public resulting from GE-Hitachi Morris Operation effluents for 2020.

Particulate and gaseous radionuclides above minimum detectable levels were used in calculations. Particulates present on the stack monitor filters were C-14, Sr-89, Cm-242, Cm-243/244, Np-237, Ni-63, and Cs-137. Gaseous radionulides evaluated were H-3 and Kr-85. The quantity of tritium released was calculated by multiplying basin water evaporative losses, by the average tritium levels in the fuel basins. The amount of Kr-85 released was calculated by multiplying the concentration found in samples taken directly over the basin water, by the airflow through the basin area.

COMPLY V1.7.1 (the EPA software program) was used to calculate the Committed Effective Dose Equivalent from the release of principle radionuclides. The quantities released and the estimated dose to the public is shown in the following table:

Nuclide Activity Discharged (Ci)

C-14 8.800E-6 Sr-89 2.100E-7 Cm-242 1.100E-7 Cm-243/244 1.300E-7 Np-237 2.000E-7 Ni-63 6.800E-7 Cs-137 5.700E-7

U.S. NRC 2020 GEH Morris Operation Annual Effluent Report M210023 February 24, 2021 Page 2 of2 H-3 7.000E-3 Kr-85 1.100E-O Committed Effective Dose Equivalent: 6.1 E-6 mRem/year There are no liquid effluents from the site. Surface and groundwater water tritium levels were below minimum detectable levels and are conservatively reported as the minimum detectable level.

The maximum potential Committed Effective Dose Equivalent to the public that could occur from surface water was calculated to be 7.2 E-3 mRem - based on a person consuming water all year from the Sanitary Lagoons (MDA of 158 pCi/1 H-3).

The maximum potential Committed Effective Dose Equivalent to the public that could occur from groundwater was calculated to be 7.1E-3 mRem- based on a person consuming water all year from any of the following wells: DM-1, 2, 3, 4, 5, 6, 7, and 8 (MDA of 155 pCi/1 H-3).

Measurement of direct radiation at the GE-Hitachi Morris Operation owner control boundary is accomplished using TLDs prepared and processed by a NVLAP certified laboratory using direct measurement techniques. The calculated maximum potential Deep Dose Equivalent to the public that could occur from direct radiation at the boundary of the owner-controlled area was calculated to be 0.109 mRem assuming the maximum time spent at the boundary is 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per year.

The maximum potential radiation dose to the publict for 2020, would result from the sum of the stack effluent releases, the dose from drinking surface water from the Sanitary Lagoons, ground water from monitoring wells DM-1 , 2, 3, 4, 5, 6, 7, and 8, and from direct radiation at the owner controlled boundary. The maximum potential Total Effective Dose Equivalent (TEDE) to the public estimated from these sources for 2020 is 0.12 mRem.

Commitments: None Cc: K. Banovac, USNRC DFM M. Kunowski, USNRC Rill PM 21-003