Information Notice No.80-05 – Chloride Contamination of Safety Related Piping and Components
SSINS No.: 6870
Accession No.:
7912190673
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
February 8, 1980
Information Notice No. 80-05
CHLORIDE CONTAMINATION OF SAFETY RELATED PIPING AND COMPONENTS
A Bechtel Power Corporation Study at the Wolf Creek Project has revealed
that a fire retardant coating is potentially corrosive in contact with
stainless steel.
Albi "Duraspray" is a fire retardant coating which contains magnesium
oxychloride, and is used for fireproofing of exposed structural steel in
some Nuclear Power Plants. There appears to be no deleterious effect when it
is applied over unprimed, inorganic zinc coated, or galvanized steel,
however, it may be corrosive in contact with stainless steel, bare aluminum
or copper. Droppings or overspray of this material cannot be properly
removed with water. Diluted Nitric, acid has been proven to be a useful
cleanser, however, it presents a safety hazard.
Applicants and holders of construction permits and licensees of operating
power reactors are advised to protect all stainless steel, copper and
aluminum material from overspray and droppage of cementitious oxychloride
materials and to remove accidently applied materials immediately and
completely employing strict safety precautions during the process. Special
attention should be given to weld areas in any removal procedures.
No written response to this information notice is required. If you require
additional information regarding this matter contact the Director of the
appropriate NRC Regional Office.
Page Last Reviewed/Updated Thursday, March 25, 2021