External dose assessment for workers dismantling the bio-shield of a commercial power nuclear reactor: Case study of Kori-1, Korea

Argentina is performing CAREM X Nuclear System Case Study based on CAREM nuclear reactor and Once Through Fuel Cycle, using SIGMA for enriched uranium production, and a deep geological repository for final disposal of high level waste after surface intermediate storage in horizontal natural convection silos, to verify INPRO (International Project on Innovative Nuclear Reactors and Fuel Cycles) methodology. Projections show that developing countries could play a crucial role in the deployment of nuclear energy, in the next fifty years. This case study will be highly useful for checking INPRO methodology for this scenario. In this contribution to ICONE 12, the preliminary findings of the Case Study are presented, including proposals to improve the INPRO methodology.

Download Full-text

Environmental dose assessment using Ecolego: case study of soil from Japan

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-012-2412-8 ◽

2013 ◽

Vol 297 (3) ◽

pp. 443-450

Author(s):

P. Krisanangkura ◽

T. Itthipoonthanakorn ◽

S. Udomsomporn

Keyword(s):

Dose Assessment

Download Full-text

Case Study: Knowledge Preservation for a Nuclear Reactor

Trends in Enterprise Knowledge Management ◽

10.1002/9780470612132.ch17 ◽

2010 ◽

pp. 281-292

Author(s):

Marta Eppenstein

Keyword(s):

Nuclear Reactor ◽

Knowledge Preservation

Download Full-text

Small Nuclear Reactor—Nordic District Heating Case Study

Energies ◽

10.3390/en13153782 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3782 ◽

Cited By ~ 2

Author(s):

Antti Teräsvirta ◽

Sanna Syri ◽

Pauli Hiltunen

Keyword(s):

Nuclear Reactor ◽

Computer Software ◽

District Heating ◽

Heating System ◽

Maximum Output ◽

District Heating System ◽

Fuel Prices ◽

Micro Reactors ◽

Financial Impacts

Small Modular Reactors (SMRs) have been recognized to have potential in decarbonizing district heating, which is currently an urgent sustainability challenge in many European countries. In this paper, the financial impacts of replacing peat and biomass-powered Combined Heat and Power (CHP) plants with heat-only reactors of 24–200 MW power range and maximum output temperatures of 120 °C are studied. A district heating system of a medium-sized Nordic city in Eastern Finland is modeled with EnergyPRO computer software (EMD International A/S, Aalborg, Denmark), which is used to optimize plant units’ production for cost effectiveness. A future scenario is used to predict electricity prices, expenditures from CO2 emission allowances, and fuel prices for the studied case. Results show that the low operating expenditures of CO2 free heat-only reactors would compensate for the revenue losses from electricity sales and that a small number of micro reactors, with power output in the tens of megawatts range each, would be optimal for the studied case. Since investment cost estimates for SMRs still bear significant uncertainties, the subject should be followed in further studies, as heat-only SMRs could provide a profitable alternative for current CHP production in the future.

Download Full-text

A Sensing Technique for Controlled Intervention in Protective Systems

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.3149613 ◽

1980 ◽

Vol 102 (4) ◽

pp. 273-280

Author(s):

C. K. Sanathanan ◽

D. K. Warinner ◽

J. H. Tessier

Keyword(s):

Nuclear Reactor ◽

Plant Protection ◽

Protective Action ◽

Reactor Core ◽

Measurement Signal ◽

Decision Logic ◽

Plant Protection System ◽

Average Filter ◽

Protective Systems

This paper presents a case study of the safety instrumentation for a class of intensive heat-transfer systems that must be protected against severe loss of cooling while preventing premature intervention for momentary loss of cooling. A safety experiment conducted in a test nuclear reactor to simulate abnormal conditions in a prototypic Liquid-Metal-Cooled Fast Breeder Reactor core subassembly is used to illustrate the surveillance technique. The protective action arising from a decision based on loss-of-cooling severity is referred to as controlled intervention. The decision-making process is based on real-time interpretation of measured signals by hard-wire analog methods; the test reactor’s plant-protection system requires a simple and reliable sensing device. The output of a moving-time-average filter (whose input is the coolant-flow-rate measurement signal) is found to be capable of discriminating between insignificant and significant flow disruption and it is therefore used to trigger the decision logic to scram the reactor automatically.

Download Full-text