On December 12, 2011, we received a directive document^*1 "Regarding the revision of the technical specification based upon the evaluation result of the facility management plan of Fukushima Daiichi Nuclear Power Station" from NISA (Press release issued on December 12, 2011).

In accordance with this direction, we have requested NISA to approve the changes to our current technical specification for the nuclear reactor facility at Fukushima Daiichi Nuclear Power Station in order to incorporate updates such as equipment installations and restorations.

Provided below is the outline of proposed changes.

- As the evaluation of "Report with regard to the facility operation plan based on "Policy on the mid term security" for Units 1 to 4 of Fukushima Daiichi Nuclear Power Station (Part 2 & Part 3)" has been completed, Chapter 12 of the technical specification will be revised subject to this document.

- The installation of PCV gas control systems in Reactors 2 and 3 has enabled the continuous monitoring of short-half-life nuclides utilizing a radiation detector. Also, the Reactor 4 diesel generator (sub-system B) has been restored and is in stand-by operation as emergency power supply. Therefore, the technical specification will be revised.

- Technical specification provisions in Chapter 12 will be optimized to reflect the actual equipment usage at Fukushima Daiichi Nuclear Power Station.

Attachment:: Comparison table of the revision of the technical specification for the nuclear reactor facility at Fukushima Daiichi Nuclear Power Station (PDF 404KB)

* The attachment was partially modified from the perspective of physical protection (July 3, 2012).

*1 Directive document
"Regarding the revision of the technical specification based upon the evaluation result of the facility management plan of Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company (Direction)"

[We have provided a Japanese press release version of the instruction document received from NISA. However, at this time we have reserved the right to not provide an English version due to potential misunderstandings that may arise from an inaccurate rendering of the original Japanese text. We may provide the English translation that NISA releases in our press releases. However, in principle we would advise you to visit the NISA website for timely and accurate information.]