uninterruptible power LIVERMORE LAB / Livermore Lab safety problems reported / U.S. probe finds ventilation flaws at plutonium building
Federal investigators found a major flaw in the safety procedures at Lawrence Livermore National Laboratory, saying that the risks faced by laboratory staff and the public increased, including a radioactive fire that could burn for several days.Investigators from the Washington defense nuclear facility Safety CommitteeC.A panel of advisers authorized by the US CongressS.The Department of Energy said that recent changes to its safety plan by the laboratory were flawed and not as reliable as the systems used before.In a five-On March 17, safety board investigators cited defects in the safety plan for building 332 of the laboratory.For example, a ventilation system should prevent leakage of radioactive substances in an accident.But now, a letter from safety committee chairman John Conway to the Department of Energy says changes to the previously reliable ventilation system have been downgraded to enough to raise concerns about public safety.A letter dated April 12 addressed to Linton Brooks, director of the Department of Energy's National Nuclear Safety Administration, accompanied by the investigator's report.Both documents are posted on the federal website.-www.dnfsb.Gov/pub_docs/llnl/sir _ 20040412 _ ll.pdf.Joe Sefchick, the project leader of the Livermore nuclear material technology project, strongly denied the allegations, which included the construction of the plutonium."There is no danger....Even if something goes wrong, we will be in a "fail-safe" state .""We have reached a unique level of security in the United States.S.Nuclear weapons complex."Livermore officials submitted their new security procedures to the office of the National Nuclear Security Agency Livermore, which manages the national nuclear weapons complex, on October.But investigators say recent changes have reduced the following features of the plutonium building :--Emergency power system.--A ventilation system connected to the gloves that allows the worker to use plutonium in a sealed chamber.--Other parts of the building ventilation system.--Part of the fire detection and fire extinguishing system."Some components of these systems (E.G.g.Uninterrupted power supply) further downgraded to unsafe-level" --In other words, in the case of a power outage, it became unsafe, and the reports of the two investigators were only passed by their first and last initials F.Bamdad and D.Kupferer.Late on Thursday, it was not possible to determine the full name of Bunda and kupfeer.Part of Livermore's new plan, the report says, is unrealistic and inconsistent with Livermore's other security procedures.In addition, the report states that Livermore may have underestimated the number of radioactive substances entering the environment.In addition, the safety plan naively assumes that the duration of the fire does not exceed two hours."In fact, events like this can last for a few days," wrote Bamdad and Kupferer .".During the fire, even radioactive particles that were initially trapped inside the building will eventually leak out to the outside as the building faces subtle physical pressure, such as due to changes in temperature during the dayNight cycle and "The impact of wind on the building "."In serious accidents," it can be imagined that the spread of pollution throughout the facility may endanger the recovery and future use of the facility "---They added that it was forced to give up.They pointed out that some aspects of the security plan are not well defined.However, sefvic says the lab is safer, in part because they strengthen the power supply, which helps to maintain certain security mechanisms ---Such as ventilation system--Work anyway.The lab usually gets power from two external sources: PG & E and utilities in Washington state (via special cables ).If these sources fail, there are three diesel generators in the lab that can provide power, sefke said.Even if all five power supplies fail, other improvements ensure safety.For example, in the event of a fire, the heat melts certain links in the ventilation system, causing the ventilator to shut down automatically.Result: the fire will suffocate due to lack of fresh air."We have 200 people working in this facility every day," said Sefchick."None of us will work there if it is not safe.