Water / Wastewater 35
Is Sellafi eld inching towards nuclear catastrophe? TALKING POINT
Sellafi eld, located on England’s north-west coast, is a multifaceted site embodying the complexities of the nuclear age. Its origins lie in the Cold War, where it played a pivotal role in the UK’s nuclear weapons development and later hosted Calder Hall, the world’s fi rst commercial nuclear power station. However, Sellafi eld’s legacy is marred by incidents like the 1957 Windscale fi re, one of Europe’s worst nuclear accidents, which released widespread radioactive contamination.
The fi nancial and environmental challenges of Sellafi eld are immense. The site’s decommissioning and management costs contribute signifi cantly to the UK’s nuclear cleanup budget, estimated at £263 billion. These costs are exacerbated by the necessity of managing the site’s vast amounts of radioactive waste. Despite these challenges, Sellafi eld remains a cornerstone of the local economy, off ering essential employment in a region with few alternatives.
Internationally, the site has raised concerns, particularly from countries like Norway and Ireland, about the environmental impacts of radioactive substances released into the sea. Sellafi eld, home to the world’s largest plutonium store, continues to be a focal point in global nuclear safety and waste disposal discussions.
Central to the site’s current scrutiny are the aging facilities, notably the B30 pond, originally a temporary storage for spent nuclear fuel. This pond, designed for short-term use, became a prolonged repository, eventually housing a hazardous radioactive sludge. The decommissioning of B30,
now the First Generation Magnox Storage Pond, is a costly and lengthy endeavour, indicative of the broader challenges at Sellafi eld.
Other aging structures, like B38 and B29 and the Magnox Swarf Storage Silo (MSSS), present ongoing safety and environmental concerns. The MSSS, in particular, has been leaking radioactive water since the 1970s, raising serious groundwater contamination fears. Despite these challenges, the UK’s Offi ce for Nuclear Regulation (ONR) asserts that current operations are safe, though internal and independent assessments call for heightened attention to these risks.
The UK government’s response involves developing a geological disposal facility, aligning with international best practices for safe, long-term radioactive material management. This project is critical for addressing the nation’s nuclear waste challenges.
Sellafi eld’s journey is a constant reminder of the responsibilities and complexities inherent in nuclear technology. As the site progresses in its decommissioning and waste management eff orts, it remains a crucial example of the ongoing need for vigilance, innovation, and regulatory oversight in the nuclear domain. The situation at Sellafi eld highlights the delicate balance between harnessing nuclear power and ensuring environmental safety and economic viability, raising questions about the future of nuclear technology in an increasingly environmentally conscious world.
Corrosion-resistant conductivity level logger
The Levelogger 5 LTC, from Solinst, continuously measures and logs water level fl uctuations, temperature and conductivity. It is simply programmed using Levelogger PC Software to record at intervals as often as 2 seconds. Event-based and customised scheduled samplings are also options.
The Levelogger 5 LTC offers a number of useful features, including an 8-year battery life, memory for 100,000 sets of readings, and 6 pressure ranges. A PFAS-free coating baked on using polymerisation technology (inside and out) provides superior corrosion and abrasion resistance.
The 4-electrode platinum conductivity sensor has a wide calibrated conductivity range, with auto-ranging from 0 to 100,000 µS/cm. For the highest accuracy, calibration is from 50 to 80,000 µS/cm. Ideal for providing a general indication of water quality.
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