The nation's nuclear watchdog gave conditional approval Sept. 13 to Tokyo Electric Power Co.’s application to resume operations of its Kashiwazaki-Kariwa nuclear plant.

It marks the first time that reactors operated by TEPCO, which manages the crippled Fukushima No. 1 nuclear plant, have passed more stringent reactor regulations imposed by the Nuclear Regulation Authority after the triple meltdown in 2011.

The two reactors at the plant in Niigata Prefecture--the No. 6 and No. 7 units--are the first boiling-water reactors in Japan to clear the regulations. They are the same type as the reactors at the Fukushima plant.

The NRA already accepts that TEPCO has the technological know-how to operate the Kashiwazaki-Kariwa plant, one of the world’s largest.

But it had harbored doubts about the company's fitness to operate a nuclear plant, given its tendency to put its balance sheet ahead of safety precautions.

The NRA ordered TEPCO to provide in the legally required safety code a detailed explanation of procedures it will take to ensure that the Kashiwazaki-Kariwa plant is operated safely.

That way, the watchdog body aims to make the utility legally accountable if problems arise.

It will also closely monitor the utility's actions in adhering to the safety code once the NRA approves the measures proposed by TEPCO.

The NRA will summon Tomoaki Kobayakawa, the new president of TEPCO, to request a more demanding safety code from the company.

As another condition for a restart, the NRA called for the industry ministry’s clear-cut commitment to oversee TEPCO’s compliance with safety if it is satisfied with the utility’s pledge to respond appropriately to the decommissioning of the Fukushima No. 1 nuclear plant. The industry ministry oversees the nuclear industry.

Despite the NRA’s conditional approval, the utility will need to gain consent from local governments for a restart.

Niigata Governor Ryuichi Yoneyama, who took office last year, has made it clear that he will not agree to the restart until the prefectural government completes its investigation into the Fukushima nuclear disaster to determine what went wrong. The investigation is expected to take several years.

In an effort to underscore its eligibility as an operator of a nuclear plant, TEPCO submitted a written pledge in August that it is “determined to take the initiative in addressing the needs of victims in Fukushima Prefecture and accomplish the decommissioning of the Fukushima No. 1 nuclear power plant.”

If the safety code and the industry minister’s commitment are secured, the NRA concluded that the utility will be eligible to resume operations of the Kashiwazaki-Kariwa plant.

Shunichi Tanaka, chairman of the NRA, said at the Sept. 13 meeting that TEPCO’s vow in August is “binding.”

The NRA indicated that if TEPCO fails to adhere to its “promise” to heed to safety, it will exercise the power to suspend the Kashiwazaki-Kariwa plant’s operations or revoke its license to operate it.

The Kashiwazaki-Kariwa plant has seven reactors. The No. 6 reactor and the No. 7 reactor started operations in 1996 and 1997, respectively. Each has a capacity of 1.36 gigawatts.