Document Details


Title:
DESIGN CRITERIA FOR ROOF WASHDOWN SYSTEM PHASE 1. FALLOUT REMOVALSTUDIES ON TYPICAL ROOFING SURFACES FOR TWO SIZE RANGES OF PARTICLES ( 177-350 MICRONS AND 350-590 MICRONS )
Author(s):
HEISKELL, R H [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; KEHRER, W S [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; VELLA, N J [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]; BROWN, G [UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATORY]
Subject Terms:
FALLOUT; SURFACE CLEANING; MATERIALS; WIGWAM OPERATION; CASTLE OPERATION; REDWING PROJECT
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1963 Jul 18
Declassification Status:
Unknown
Document Pages:
0081
Accession Number:
NV0060051
Document Number(s):
USNRDLTR672
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
FALLOUT SIMULANT PARTICLES RANGING IN SIZE FROM 177 TO 350 AND 350 TO 590 MICRONS WERE DEPOSITED ON SELECTED TYPICAL ROOF SECTIONS 48 FEET L ONG BY 8 FEET WIDE TO DETERMINE THE EFFECT OF WATER FLOW RATE, SLOPE, AND SURFACE TYPE ON WASHDOWN EFFECTIVENESS. MORE THAN 90 PERCENT OF T HE SIMULANT CAN BE REMOVED ON COMPOSITION SHINGLES, ALUMINUM SHINGLES AND ROLL ROOFING AT SLOPES OF 1:12 OR STEEPER WITH TWO TO THREE GALLON S OF WATER PER MINUTE PER FOOT OF ROOF WIDTH (GPM/FT). IT WAS FOUND T HAT WASHDOWN IS INEFFECTIVE ON TAR AND GRAVEL ROOFING WITHOUT PRIOR RE MOVAL OF THE LOOSE GRAVEL. WASHDOWN ON A FIBERGLASS EPOXY LAMINATED R OOF WILL REMOVE BETTER THAN 99 PERCENT OF THE SIMULANT PARTICLES WITH A WATER FLOW RATE AS LOW AS ONE GALLON PER MINUTE PER FOOT.


<< Return to Search Results