Groundwater Protection Initiative: Voluntary Data Collection Questionnaire

Opening note from Edward J. Weinkam (Director, Nuclear Licensing and Regulatory Services, Nuclear Management Company, LLC), July 31, 2006:

“The nuclear industry, in conjunction with the Nuclear Energy Institute, has developed a questionnaire to facilitate the collection of groundwater data at commercial nuclear reactor sites. The objective of the questionnaire is to compile baseline information about the current status of site programs for monitoring and protecting groundwater and to share that information with NRC. The competed questionnaire for the above listed sites operated by Nuclear Mangement Company, LLC are enclosed.” 

Enclosure 3

Industry Groundwater Protection Initiative

Voluntary Data Collection Questionnaire 

Monticello Nuclear Generating Plant 

The Nuclear Energy Institute has developed a questionnaire to facilitate the collection of groundwater data at commercial nuclear reactor sites. The objective of the questionnaire is to compile baseline information about the current status of site programs for monitoring and protecting groundwater and to share that information with NRC. The completed questionnaire for Monticello Nuclear Generating Plant (MNGP) follows.

1. Briefly describe the program and/or methods used for detection of leakage of spills from plant systems, structures, and components that have a potential for an inadvertent release of radioactivity from plant operations into groundwater.

  • Permanent outdoor radioactive water storage tanks at MNGP (condensate water) are located within a basin designed to contain leakage. Leakage from the tanks would be detected either visually or during routine sampling and analysis, which is preformed prior to periodic removal of accumulated precipitation.
  • The MNGP spent fuel pool has a leak detection system that includes a skimmer surge tank low level alarm, a fuel pool low level alarm, and an inspection of the fuel pool liner drains once per shift.
  • Engineers perform periodic walk downs of the systems for which they are responsible. These walkdowns include the requirement to identify and report leaks and spills. Leaks and spills are addressed through any of the following: decontamination, notifying supervision for assistance, writing a work request or initiating a Corrective Action Report.
  • Operations personnel conduct shiftly walkdowns of plant systems and are required to identify and report leaks and spills. Leaks and spills are addressed through ay of the following: decontamination, notifying supervision for assistance, writing a work request or initiating a Corrective Action Report.
  • The site corrective action program is used for reporting and trending leaks and spills. The process facilitates anonymous reporting.
  • The Radiological Environmental Monitoring Program (REMP) includes periodic sampling and analysis of onsite and offsite groundwater wells.

2. Briefly describe the program and/or methods for monitoring onsite groundwater for the presence of radioactivity released from plant operations.

  • MNGP has one onsite groundwater monitoring well, which is sampled as part of the REMP. This well is one of several that supply water for employee consumption.
  • In addition, MNGP samples two offsite groundwater wells (one residential and one public) as part of the REMP.
  • The wells are sampled quarterly and analyzed for gamma-emitting radionuclides and tritium.
  • The samples are analyzed to the site’s REMP criteria.
  • Typical sample Minimum Detectable Activities (MDAs) are as follows.
Nuclide Typical MDA (pCi/l)
3H 500
54Mn 10
59Fe 30
58Co/60Co 10
65Zn 30
95Zr-Nb 15
131I 1
134Cs/137Cs 10
140Ba-La 15

3. If applicable, briefly summarize any occurrences of inadvertent releases of radioactive liquids that had the potential to reach groundwater and have been documented in accordance with 10 CFR 50.75(g).

Not applicable. There are no inadvertent releases of radioactive liquids documented in accordance with 10 CFR 50.75(g).

4. If applicable, briefly summarize the circumstances associated with any onsite or offsite groundwater monitoring result indicating a concentration in groundwater of radioactivity released from plant operations that exceeds the maximum contaminant level (MCl) established by the U.S. EPA for drinking water.

Not applicable. No groundwater monitoring results have exceeded the maximum contaminant level (MCl) established by the U.S. EPA for drinking water.

5. Briefly describe any remediation efforts undertaken or planned to reduce or eliminate levels of radioactivity resulting from plant operations in soil or groundwater onsite or offsite.

Not applicable. No remediation efforts have been planned or undertaken to reduce or eliminate levels of radioactivity resulting from plant operations in soil or groundwater onsite or offiste.

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This entry was posted in Boiling Water Reactor, Documents and Reports, Monitoring, Monticello Nuclear Power Plant, Performance Evaluation, Radiation Information, Radioactive, Sampling. Bookmark the permalink.

3 Responses to Groundwater Protection Initiative: Voluntary Data Collection Questionnaire

  1. Pingback: Radiation Sampling | radioactive monticello

  2. Pingback: Sampling Locations (MNDH) | radioactive monticello

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