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A late addition to the Dodd-Frank Act--the regulation meant to address the roots of the financial crisis--took effect this month. But it doesn't always help merchants.

By Risa Maeda and Kazunori Takada TOKYO, March 22 (Reuters) - Rising temperatures around the core of one of the reactors at Japan's quake-crippled nuclear plant sparked new concern on Tuesday and more water was needed to cool it down, the plant's operator said. Despite hopes of progress in the world's worst nuclear crisis in a quarter of a century, triggered by an earthquake and tsunami that left at least 21,000 people dead or missing, plant operator Tokyo Electric Power Co (TEPCO) said it needed more time before it could say the reactors were stabilised. Technicians working inside an evacuation zone around the stricken plant on Japan's northeast Pacific coast, 250 km (150 miles) north of Tokyo, have attached power cables to all six reactors and started a pump at one to cool overheating nuclear fuel rods.