JAPAN ATOMIC INDUSTRIAL FORUM, INC.

for Japanese

ATOMS in JAPAN

8 June, 2020

NRA Grants Permission to Make Changes to Reactor Installation at HTTR under New Regulatory Standards

At a meeting on June 3, the Nuclear Regulation Authority of Japan (NRA) finalized a review report for the High-Temperature Engineering Test Reactor (HTTR), owned by the Japan Atomic Energy Agency (JAEA), saying that it was compatible with the new regulatory standards. The reactor, with a thermal output of 30MW, is situated in Oarai Town, Ibaraki Prefecture. The NRA then issued the Agency its approval to make changes to the reactor installation (basic design approval).

Earlier this year, on March 25, the NRA had issued a draft review report—which was also given to the Japan Atomic Energy Commission (JAEC) and the head of the Ministry of Education, Culture, Sports, Science and Technology (MEXT)—and made it open to the public for comments. It has been five and a half years since JAEA initially filed an application for an examination in November 2014.

The HTTR is smaller than light water reactors (LWRs), which typically have electric outputs in the range of 1,000MW, but its outlet temperature of 850℃ to 950℃ at design thermal output—compared with just 300℃ for LWRs—is expected to be used for a broad range of purposes, including hydrogen production, the desalination of seawater, and regional power generation.

Moreover, through its use of chemically stable helium as coolant, the HTTR is extremely safe at high temperatures, in the structure of its ceramic-cladded fuel (effective at confining radioactive substances at temperatures up to 1,600℃), and in other respects.

JAEA will continue with work on safety measures so as to resume operation of the HTTR by the end of the current fiscal year (i.e., by March 31, 2021). Immediately after the restart of the HTTR, the Agency will complete the Loss of Forced Coolant (LOFC) Project, a series of safety verification tests within the OECD/NEA framework.

The basic safety characteristics of the HTTR, including scramming, cooling, etc., had been recognized in the first phase of the tests (at 30-percent output, tripping the helium gas circulators), which ended in FY10. Further tests will involve more extreme conditions. Ultimately, the results will contribute to the international standardization of safety for high-temperature gas-cooled reactors (HTGCRs).

Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

SNS facebooktwitter

NPPs Map

Video

Voices from Nuclear Industry – Contributing to a clean and resilient recovery

3 September, 2020
Voices from Nuclear Industry – Contributing to a clean and resilient recovery03:59

Recent News

16 October, 2020
Government’s Strategic Policy Committee Starts Deliberations toward Revision of Strategic Energy Plan
13 October, 2020
NUMO Accepts Suttsu’s Application for Literature Survey in Selecting HLW Final Disposal Site—First Since Release of Map of Scientific Features
12 October, 2020
Nuclear Power Plant and Reactor Exporters’ Principles of Conduct (NuPoC)
9 October, 2020
NRA Approves Draft Review Report Finding MOX Fuel Fabrication Plant Compatible with Regulatory Standards
23 September, 2020
Hitachi to End Business Operations on UK Nuclear Power Project
15 September, 2020
Japan’s Cabinet Office to Hold Virtual Side Event on Radiation Cancer Therapy at IAEA General Conference
10 September, 2020
New Report Released on Nuclear Power’s Role in Dealing with Environment Issues
4 September, 2020
Japan’s NRA Says RFS’s Recyclable-Fuel Storage Center Is Compatible with Regulatory Standards
3 September, 2020
JAIF Issues Joint Video Message with Foreign Counterparts
27 August, 2020
METI Minister Kajiyama Stresses Importance of Realizing HLW Final Disposal
▲TOP