Nuclear Engineering and Technology

  • 제28권1호
  • /
  • Pages.79-92
  • /
  • 1996
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지

저준위 방사성폐기물 처분장에서의 기체 발생 평가

Assessment of Gas Generation in Underground Repository of Low-Level Waste

  • 발행 : 1996.02.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

방사성폐기물 처분후 처분장내에서는 금속의 부식과 셀룰로스 물질의 미생물 분해에 의한 기체가 발생하게 된다. 이 논문에서는 금속부식과 미생물 분해에 의해 발생되는 기체의 발생률을 예측하는 수학적 모델을 검토하고, 그로부터 저준위 방사성폐기물 처분장에 대한 기체 발생률을 예측하여 보았다. 금속성 물질의 부식은 3단계로 일어나며 그중 마지막 단계에서 H$_2$가 발생하게 된다. 셀룰로스 물질의 미생물 분해는 8가지 형태의 박테리아에 의해 일어나는 화학반응에 따라H$_2$, $CO_2$, CH$_4$등이 발생하게 되는데 이는 처분장내의 pH 및 몇몇 화학종의 농도에 따라 반응률이 결정되게 된다. 이 논문에서는 처분후 약10,000년 동안 발생되는 주요 기체의 발생률 및 누적발생 량을 예측하여 보았다. 평가 결과, 중저준위 방사성폐기물 처분장내에서 발생되는 기체는 H$_2$가 가장 많이 발생되는 것을 알 수 있었다.

In a repository containing low-level waste, gas generation will occur principally by the coupled processes of metal corrosion and microbial degradation of cellulosic waste. This paper describes a mathematical model designed to address gas generation by these mechanisms and assesses the potential effects of gas generation on the performance of a radioactive waste repository. The metal corrosion model incorporates a three-stage process encompassing aerobic and anaerobic corrosion regimes ; the microbial degradation model simulates the activities of eight different microbial populations, which are maintained as functions both of pH and of the concentrations of particular chemical species. A prediction is made for gas concentrations and generation rates over an assessment period of ten thousand years in a radioactive waste repository. The results suggest that H$_2$will be the principal gas generated within the radioactive waste cavern.

키워드

참고문헌

  1. Nucl. Energy v.32 no.2 Modelling Gas Generation in Radioactive Waste Repositories P.J. Agg
  2. UK Nirex Ltd Report NSS/R338 GAMMON(Version 1A) : A Computer Program Addressing Gas Generation in Radioactive Waste Repositories. Part A: Overview G. Purdom;P.J. Agg
  3. Biochemical Engineering and Biotechnology Handbook B. Atkinson;A. Mavituna
  4. Agricultural Wastes v.2 Modelling Techniques and Computer Simulation of Agricultural Waste Treatment Processes D.T. Hill
  5. J. Water Pollution Control Federation v.49 no.10 A Dynamic Model for Simulation of Animal Waste Digestion D.T. Hill;C.L. Barth
  6. Tran. Am. Soc. Agric. Eng. v.25 no.5 A Comprehensive Dynamic Model for Animal Waste Methanogenesis D.T. Hill
  7. Agricultural Wastes v.5 no.2 The Kinetics of Inhibition in Methane Fermentation of Swine Manure D.T. Hill;E.W. Tollner;R.D. Holmberg
  8. AEA Industrial Technology DC06AD : User Documentation, Computational Fluid Dynamics Department R.G. Myhill
  9. UK Nirex Ltd Report NSS/G120 NSARP Reference Document : Gas Generation and Migration P.J. Agg(et al.)
  10. UK Nirex Ltd Report NSS/R322 Investigations into the Potential Rates, Quality and Generated Pressure of Gas Generated from the Biodegradation of Simulated LLW C. McDonald(et al.)
  11. UK Nirex Ltd Report NSS/R299 A Critical Assessment and Approach to Validation of the Gas Generation Program GAMMON Y. Gunn(et al.)
  12. Korea Atomic Energy Research Institute Report KAERI-NEMAC/PR-32/93 A Study on the Requirements for Basic Design of a Repository for Low-Level Radioactive Waste H.S. Park(et al.)