The cooling system of a spent fuel pool for the No. 6 reactor at the wrecked Fukushima Daiichi nuclear plant stopped temporarily for about 10 hours Tuesday due to a power panel glitch, the plant operator said. The pump sending cooling water to the spent fuel pool started working again at around 6:20 p.m. after a high voltage circuit breaker tripped at around 8:35 a.m., according to Tokyo Electric Power Company Holdings Inc. An emergency diesel generator did start up immediately after the circuit breaker tripped but it did not activate the pump. No significant changes in the water level or the …