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Central Registry Toolbox Code Version(s):  2.10.1
Code Owner:  Pacific Northwest National Laboratory (PNNL)

GENII is a second generation of environmental dosimetry computer code compiled in the Hanford Environmental Dosimetry System (Generation II). GENII provides a state-of-the-art, technically peer-reviewed, documented set of programs for calculating radiation dose and risk from radio nuclides released into the environment. The GENII System includes capabilities for calculating radiation doses following postulated chronic and acute releases.

In May 2004, DOE performed an evaluation of GENII against DOE’s safety software quality assurance criteria. A gap analysis report was generated that identifies the strengths and weaknesses based upon ASME NQA-1 criteria.  Upon completion of this evaluation, GENII V1.485 and 2.0 were included in DOE’s safety software Central Registry as safety analysis toolbox codes.

In August 2013, DOE completed an evaluation of GENII V2.10.1, which was based upon the DOE’s safety software quality assurance criteria defined in DOE G 414.1-4. The results of the evaluation were documented in a report with recommendations. PNNL completed implementing recommendations identified. Subsequently, DOE approved GENII V2.10.1 for listing as a toolbox code in the Central Registry. The evaluation report is posted on the Safety Software Communication Form (SSCF) at This is an access controlled (password protected) site for use by DOE and its contractors.

For more information on GENII, please visit:

Reports and Publications Related to GENII:

Note: Non-DOE issued reports and publications are not endorsed for technical content by DOE. These reports are provided on this web site as a courtesy to the DOE community.

The GENII code-specific guidance report has been issued identifying applicable regimes in accident analysis, default inputs, and special conditions for using the code, July 2004.

The GENII gap analysis was performed to determine the actions needed to bring the code into compliance with SQA criteria, May 2004