公开(公告)号：WO1999017302A1

公开(公告)日：1999-04-08

申请号：PCT/JP1997003502

申请日：1997-10-01

Applicant: HITACHI, LTD. ,  UETAKE, Naohito ,  WADA, Yoichi

Inventor： HITACHI, LTD.

IPC: G21D01/00

CPC classification number: G21C17/0225 ,  G21Y2002/103 ,  G21Y2004/20

Abstract: Water quality control method used when hydrogen is injected into reactor water of a BWR plant. Even if low concentration hydrogen is injected, SCC of the core internals can be suppressed and, further, local corrosion can be avoided. A metal oxide which reacts as an oxidation catalyst of hydrogen is applied to the surfaces of the core internals of a boiling water reactor beforehand and then hydrogen is injected into the reactor water with which the core internals are in contact.

Abstract translation: 将氢气注入BWR工厂的反应堆水中时使用的水质控制方法。 即使注入低浓度的氢，也可以抑制芯内部的SCC，进一步避免局部腐蚀。 将作为氢氧化催化剂反应的金属氧化物预先施加到沸水反应堆的核心内部表面，然后将氢气注入核心内部与之接触的反应器水中。

公开(公告)号：WO1984004624A1

公开(公告)日：1984-11-22

申请号：PCT/JP1984000250

申请日：1984-05-18

Applicant: HITACHI, LTD. ,  FUKASAWA, Tetsuo ,  OTSUKA, Masaharu ,  UETAKE, Naohito ,  OZAWA, Yoshihiro

Inventor： HITACHI, LTD.

IPC: G21F09/30

CPC classification number: G21F9/165 ,  G21F9/162 ,  G21F9/302 ,  G21F9/304

Abstract: A process for solidifying radioactive wastes, which comprises adding, to pellet form or dissolved radioactive wastes, an alkali metal silicate as a filler, silicic acid, carbonic acid or an alkaline earth metal or polyvalent metal salt thereof as a hardener, and cement as an absorbent for absorbing water to be released with the progress of the reaction and, if necessary, water, and mixing and solidifying the resulting mixture to thereby prevent deterioration of water-proofness due to precipitation of readily soluble salts on the surface of a solidified substance.