Summary of 2nd Technical Conference
1. Date :September, 26, 2014 (Fri) 10:00AM ～ 1:00PM

2. Place:

Otemachi Headquater, Central Research Institute of ElectricPower Industry (CRIEPI)
3. Participants:
Chair: Yokoo（CRIEPI）
Members: Maki (Hokkaido EPCO), Wakabayashi (Tohoku EPCO, substitutefor Masuko), Igarashi, Kawamura (Tokyo EPCO), Masuda, Nakamura(substitute for Hattori) (Chubu EPCO), Takahashi (Hokuriku EPCO), Ohishi,Suzuki (Kansai EPCO), Yamamoto (Chugoku EPCO, substitute for Iwasaki),
Yamada (Shikoku EPCO), Mada (Kyushu EPCO, substitute for Okano),Takeno (JAPC substitute for Ishizaka), Takahashi (JNFL, substitute forOhgaki), Shizuma (J-Power), Nakada (Toshiba, substitute for Iikura), Konno(Hitachi GE), Saji (MHI), Kurata (JANSI), Shimeno, Zama, Sakai, Ueda,Kanatani (CRIEPI)NRRC Executives (to be appointed on Oct. 1): Apostolakis, Yokoyama, Omoto
Chair of NRRC’s Technical Advisory Committee (to be appointed on Oct.1):
Stetkar
4. Proceedings
At the beginning, the chair introduced new members from Chubu EPCO andKansai EPCO, who are in charge of civil engineering and construction
division. And the chair introduced the attendance of Dr. Apostolakis, Mr.
Yokoyama, and Dr. Omoto as executives of NRRC, and also Mr. Stetkar as
the chair of Technical Advisory Committee.
(1) Dialogue with Dr. Aposolakis
Dr. Apostolakis, as the head of NRRC, stated his aspiration, and the draft ofNRRC’s mission, vision, and short-term goal. After viewing the materials
about outline of the implementation status of PRA utilization in electricutilities, plant manufacturers, and JANSI, there was a dialogue with Dr.
Apostolakis and the conference members.

(Essential remarks of Dr. Apostolakis)
・It is essential to understand what is “risk-informed” decision making, not“risk-based.” Utilities’ decision is not only based on the results of PRA,
but also on other various information, such as legal requirements and theuncertainties of PRA results.
・NRRC is not just doing studies, but produce analytical studies which help
decision making of utilities. Therefore, I would like to hear what issues
utilities are facing, and going to face in the future.
(Remarks of the industry members)
・We agree with the mission, vision, and short-term goal of NRRC. We also
expect to see long-term goal of NRRC in due course.
・Taking new countermeasures to reduce risk may generate another risk. So
it is important to consider risks in the whole system.
(2)Activities to start up NRRC
・The NRRC preparatory team reported the draft of research plans developedby Risk Assessment working group (WG1) and External Natural Eventworking group (WG2).
・Additional research items in FY2014 were proposed and admitted.
・The preparatory team reported the schedule and procedures to establish
NRRC.
(Remarks of the industry members)
・The draft of research plan provided by WG1 is acceptable. When utilities
will apply PRA in actual site, utilities will have to keep in mind theassumptions and conditions incorporated in the PRA. We expect theresearch results to help site personnel to adequately utilize PRA.
・We expect to have knowledge on non-liner behavior of the ground andbuildings to furbish the method of fragility assessment. This is one of thefocused issues in WG2.