VGB POWERTECH 5 (2021) - International Journal for Generation and Storage of Electricity and Heat

Radioactivity calculation for retired nuclear power plant VGB PowerTech 5 l 2021
dict and classify the amount of radioactive
waste. The exact value of this parameter is
unknown at this time for the retired nuclear
power plant. However, in the future, this parameter
would be possible to obtain by mass
spectrometer through a sample; together
with the operation history the radioactivity
calculation would provide a reliable radioactivity
distribution for decommissioning.
5. Conclusion
This paper proposed an activity calculation
method considering a detailed plant-specific
operation history; the relative power
level for every month during the plant lifetime
was used. To verify the method, the
calculated activity results were compared
with measured activity results from neutron
dosimetry sensors in five surveillance
capsules representing the actual irradiation
environment. There is good agreement between
the calculated activity and measured
activity. This method can eliminate excessive
conservation in calculation to prevent
overestimation of worker exposure, and
help establish an appropriate and reasonable
dismantling and disposal strategy.
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[7] Volmert, Ben, et al., Validation of MCNP
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[8] John R. Lamarsh, Introduction to Nuclear
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2016. l
VGB-Standard
Water in Nuclear Power Plants with Light-Water Reactors
Part 1: Pressurised-Water Reactors. Part 2: Boiling-Water Reactors.
(formerly VGB-R 401)
Edition 2020 – VGB-S-401-00-2020-05-EN (VGB-S-401-00-2020-05-DE, German edition)
DIN A4, Print/eBook, 92 Pages, Price for VGB-Members € 180.–, for Non-Members € 270.–, + Shipping & VAT
Almost half a century after publication of the first edition of a VGB-Guideline for the Water in Nuclear
Power Plants with Light-Water Reactors and approx. 13 years after the third edition in 2006, the task
of a renewed adaptation of the Guideline for the Water in Light-Water Reactors as VGB-Standard arises.
This VGB-Standard shall be the common basis for the operation of the plants. It provides the framework
for operating manuals or chemical manuals, but is in no way intended to replace them.
The task of these manuals is, among other things, to consider plant-specific features and to make
specifications that go beyond this VGB-Standard.
This VGB-Standard describes the water-chemical specification for the safe operation of light-water
reactors based on the material concept of the Siemens/KWU and comparable plants.
The revision takes into account, where appropriate, the knowledge and experience gained over the
last decade in the national and international environment.
VGB-Standard
for the Water in Nuclear
Power Plants with
Light-Water Reactors
Part 1: PWR
Part 2: BWR
(Formerly VGB-R 401)
VGB-S-401-00-2020-05-EN
Notice: A background paper (VGB-S-401-91-2020-05-EN) with further notes and summarised experiences will be available in July 2021.
* Access for eBooks (PDF files) is included in the membership fees for Ordinary Members (operators, plant owners) of VGB. www.vgb.org/vgbvs4om
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