He noted that there were 111 operating plants, with 80 designs.
The heart of the problem at Shoreham is that an operating nuclear plant produces radioactivity.
Tariffs of the operating plants are in the range of Rs.
There were 72 operating plants at the time of the accident, providing 11.4 percent of the nation's electricity.
There are few replacements in sight for Trojan and 109 other commercial operating plants.
The US, with not many more operating plants than Britain, had 4,000.
A total of 15 operating plants having nearly 15,000 pumps were included in the survey.
The regulators very seldom close an operating plant.
The study does not address taking over an operating civilian plant in a national emergency, as the executive order on Friday appears to authorize.
The referendum in the district was the first vote to shut an operating plant.