Principal Research Results

Development and Operation of a Nuclear Information System for Public Use
Nuclear Information Archives (NUCIA)
BackgroundIn late summer of 2002, due to the intentional concealment of the information in the incidents report by an electric powercompany, the severe damage was caused to public reliability on the safety of Japanese nuclear plants. The Japanese electric power utility which has shared nuclear information inside the industry through “Nuclear Information/Communication System (NICS)” decided
to reveal information of nuclear incidents not only inside the industry, but also to the public. According to the decision, the CRIEPI,
which has many experiences in the operation of the NICS, began developing a new network database system called NUClear
Information Archives (NUCIA) to make nuclear information open to the public through the Internet.

Objectives
The objectives of this project are to develop and to operate steadily a nuclear network database system which has following
features:1) Maintaining the transparency of incidents occurring in nuclear plants to the public,2) Supplying the research data concerning nuclear incidents to both researchers and experts in analyzing nuclear incidents.

Principal ResultsWe developed a network database system which has following characteristics and is continuously operating from Oct., 2003.
The URL of the site is http://www.nucia.jp/ (in Japanese).
1. Improvement in transparency of incidents occurring in nuclear power plants
Not only severe incidents, but also slight incidents are registered and open to the public on the database system. The registered information are: A. details of the incidents, B. links for similar incidents, C. reliability information of the incidents, D. links ofthe press releases to the information which are open to the public on the web of the owner company.
2. User friendly network database
Any data on the site can be accessed and used by any person. And various download data types including xml, CSV, etc. areprepared for the convenience of the users.
3. Rapid publication of incident data
The data on the system is registered from the nuclear plants directly, so as to achieve the rapid publication of the information.

Future Developments
Further improvement for user friendly database is planned. And increasing variety of the registered data to extend the coverage area of its application is also planned.
This research was entrusted to the CRIEPI by the Federation of Electric Power Companies of Japan.
Main Researchers:
Shigeo Sagai, Senior Research Scientist, Information Systems Sector, System Engineering Research Laboratory
Nobuyasu Esashi, Senior Research Scientist, Nuclear Information Center, Nuclear Technology Research Laboratory
Reference
S. Sagai, 2004, “Development of the NICS-03 ---Improvement of NICS-99 to Cooperate with Nuclear Information Archives ”,Technical Report of CRIEPI P03301 (in Japanese).

785. Nuclear - Improvement of economics and reliability of LWR power generation

http://www.nucia.jp/Information about
Reliability

Information about
Incidents/Accidents
Trouble Information

Safety/Quality Control Information

Fault Rate Data

PRA/PSA Information

Information about
Incidents/Accidents

Trouble Information

Information about incidents which is obliged to report to the government

Safety/Quality ControlInformation

Information about incidents which is not obliged to report to the government
but is useful to share among the electricity industry, academy and government

Information about
Reliability

Fault Rate Data

Fault rate data of the components of the nuclear plants based on incidents

PRA/PSA Information

Explanation about the way of thinking of PRA/PSA

・Public Access to Data

Transparency of Nuclear Plants

・Information about Reliability

Detailed Analysis by Experts

Fig.1 Contents and Aim of the NUCIA

Public Access, Industry, Nuclear Experts
Non-stop Operation

The Internet

CRIEPI NUCIA

http://www.nucia.jp/Database/Web Server
Convert to formatted Data

Data Registeration Server

Direct Data
Registration throughthe Internet＜Nuclea Plant A＞＜Nuclear Plant B＞

Aim：Rapid Publication of the Data
Fig.2 Operation of the NUCIA79