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Process for decontaminating a nuclear reactor coolant system

  • US 5,305,360 A
  • Filed: 02/16/1993
  • Issued: 04/19/1994
  • Est. Priority Date: 02/16/1993
  • Status: Expired due to Fees
First Claim
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1. A process for decontaminating a reactor coolant system wherein radioactive ions and particles are transported by flowing coolant water from a nuclear reactor vessel to the balance of the system where they deposit on chromium (III) oxide-containing surfaces, comprising the steps of:

  • circulating permanganate ion-containing reactor coolant water throughout a reactor coolant system to oxidize chromium (III) oxide surfaces of the system to chromium (IV) oxide, the reactor coolant water containing from about 20 to about 2000 ppm permanganate ion; and

    thenadding formic acid to the permanganate ion-containing reactor coolant water to reduce the permanganate ions in the reactor coolant water to manganous ions.

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