Nuclear-powered rockets to Mars – there are serious safety risks.

Nuclear powered rockets could take us to Mars, but will the public accept them?

Bob McDonald’s blog: NASA and DARPA are beginning development of a new fission rocket, Bob McDonald · CBC Radio · Jan 27, 2023 

NASA has signed an agreement with the U.S. Defense Advanced Research Projects Agency (DARPA) to develop a nuclear rocket that could shorten travel time to Mars by about one quarter compared to traditional chemical rockets. But before nuclear technology is launched into space, there are risks that need to be addressed to ensure public safety…………………….

While the technology of nuclear propulsion is certainly feasible, it may not be readily embraced by the public. The accidents at Chernobyl, Three Mile Island and Fukushima have left many people skeptical about nuclear safety. And there will be risk.

A nuclear rocket wouldn’t be used to launch a spacecraft from the Earth’s surface — it would be designed to run in space only. It would have to launch into orbit on a large chemical rocket — so the public would have to accept the risk of launching a nuclear reactor on a standard rocket filled with explosive fuel.

And rockets have and will malfunction catastrophically, in what with black humour rocket scientists sometimes call RUD — “rapid unscheduled disassembly.”

No one wants to see nuclear debris raining down on the Florida coast or Disneyland, and that’s not the only possible scenario. An accident in orbit could potentially drop radioactive material into the atmosphere.

Nuclear technology in another form has been used since the very beginning of the space program, just not for propulsion. Radioisotope Thermoelectric Generators (RTGs) have provided power to deep space probes for instruments, radios and cameras on a range of missions…………………….

 The U.S. has seen several accidents, including one in 1968 when a launch failure of a Nimbus-1 weather satellite threw its RTG into the ocean. It was recovered intact and the fuel was reused on a later mission.

But there have been more serious accidents. Canadians may remember an incident from 1978, when a Soviet reconnaissance satellite scattered 50 kg of uranium from its nuclear thermal generator over 124,000 square kilometres of Canada’s North.

But a fission reactor is a much more complicated device involving higher temperatures, coolants and more nuclear fuel.

……………………. the engineers face a challenge to ensure that all checks and balances have been made to reassure the astronauts who will fly these machines — and people on the ground — that they can be operated safely before the technology is adopted. https://www.cbc.ca/radio/quirks/nuclear-powered-rockets-could-take-us-to-mars-but-will-the-public-accept-them-1.6727217

January 28, 2023 - Posted by Christina Macpherson | 2 WORLD, space travel, wastes