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Japan warned of possible nuclear leak from US sub

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[August 02, 2008]  TOKYO (AP) -- The U.S. Navy has warned that a nuclear submarine may have had radioactive leaks during recent port calls in Japan's south, the country's Foreign Ministry said Saturday.

Japan's Foreign Ministry said in a statement that it was informed by the U.S. Navy that a small amount of radiation might have leaked from the nuclear-powered USS Houston as it traveled around the Pacific.

Auto RepairThe news could cause a stir in Japan, where both the U.S. military presence and its nuclear subs are controversial.

The Houston made calls in March and April in the southern Japanese naval ports of Sasebo and Okinawa.

The ministry said leaked radioactive cooling water was detected during routine maintenance on the Houston in Hawaii in June and it was believed to have posed no threat to humans or the environment.

Sasebo city official Akihiro Yoshida said the government monitoring during the submarine's port calls showed no abnormal increase of radioactivity in the area's waters.

"Still, we are rather concerned," Yoshida said.

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The incident comes just weeks ahead of the arrival of the U.S. nuclear-powered aircraft carrier USS George Washington in Yokosuka, just south of Tokyo.

The ship's arrival was originally set for August under a Japan-U.S. security alliance, but is being delayed until late September because of a fire aboard the vessel in May. The George Washington is relieving the soon-to-be decommissioned USS Kitty Hawk and will be the first U.S. Navy nuclear powered vessel to station permanently in Japan.

The George Washington's deployment had already triggered protests and the fire escalated concerns that many Japanese have about nuclear power.

Masahiko Goto, a lawyer representing a citizens' group opposing the George Washington's deployment in Yokosuka, sharply criticized the U.S. Navy for withholding the problem for weeks.

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"They had discovered the radiation leak weeks ago and did not inform the Japanese government immediately," he said in a statement. "The U.S. Navy's handling of the accident and lack of transparency showed there is no way we can trust them."

The Foreign Ministry said the U.S. Navy informed them of the leak Friday but waited a day to announce it because the amount was negligible, stirring a flurry of criticism.

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Chief Cabinet Secretary Nobutaka Machimura called the delay "no good," and Defense Minister Yoshimasa Hayashi said "We'd have liked to hear from the Foreign Ministry earlier."

The delay also embarrassed Foreign Minister Masahiko Komura, who admitted learning about the leak through local media reports Saturday morning.

"We should have made the announcement sooner," he said.

In Honolulu, U.S. Pacific Fleet spokesman Capt. Scott Gureck said Friday the amount of radioactivity released into the environment from the USS Houston at each stop was less than one half a microcurie - a negligible amount equivalent to the radioactivity of a 50-pound bag of fertilizer.

The Navy discovered the leak July 17 when a gallon of water spilled on a shipyard worker's leg from a valve while the submarine was in dry dock for routine maintenance at Pearl Harbor.

An investigation showed water may have been slowly leaking from the valve since March as the Los Angeles-class submarine traveled around the Pacific. But the Japanese Foreign Ministry said it was not known how long the USS Houston had been leaking the cooling water.

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The Houston is based at Apra Harbor in the U.S. territory of Guam in the Western Pacific. The submarine sat in Pearl Harbor for about three weeks before it was dry-docked in mid-July.

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Associated Press Writer Audrey McAvoy in Honolulu contributed to this report.

[Associated Press; By MARI YAMAGUCHI]

Copyright 2008 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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