Chernobyl lurking in Himalaya's main rivers?

If concerted efforts are not made to recover two missing radiation detectors in the Himalayan ranges, another Chernobyl could erupt, poisoning two of Asia's biggest rivers, a Japanese filmmaker has warned.

Yoichi Shimatsu, a former editor of Japan Times who now runs an independent documentary-making agency, is asking all SAARC countries along with China and Unesco to mobilise search and recovery operations on the slopes of Mt Everest and another Himalayan range, the Nanda Devi, to locate two radiation detectors planted there by Western governments to spy on China's nuclear programme.

The Ganges and the Brahmaputra are under threat from these devices, says Shimatsu, who was here to release his presentation on the misuse of scientific research on Mt Everest.
more...

This is one scary article
http://feeds.bignewsnetwork.com/?sid=250263

The first part about the original attempt is, I believe, true. However, there would be absolutely no reason to plant such devices after the late 70s. Our nuclear surveilance capability is much greater via satellites, starting with the Velas in the 70s, than it ever would be with any remote monitoring station.

Anyway, the largest part of this is hyperbole. Chernobyl released anywhere between 20,000 and 350,000 pounds of uranium oxide, cesium, and other chemicals. This thing they're talking about is at most 4 pounds of plutonium.