ML111230346
| ML111230346 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 12/30/1975 |
| From: | Suhrke K Babcock & Wilcox Co |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML111230347 | List: |
| References | |
| NUDOCS 7906290287 | |
| Download: ML111230346 (6) | |
Text
ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C. 20555 IE Circular No. 79-09 Date:
June 22, 1979 Page 1 of 1 OCCURRENCES OF SPLIT OR PUNCTURED REG ULATOR DIAPHRAGMS IN CERTAIN SELF-CONTAINED BREATHING APPARATUS Description of Circumstances:
The Nuclear Regulatory Commission (NRC) has been informed by mailgram (copy enclosed) from the National Institute of Occupational Safety and Health (NIOSH) of the high rate of regulator diaphragm failures in the Scott Air Pak II/IIA and Presur-Pak II/IIA self-contained breathing apparatus.
The failures, ranging from pin holes in-the diaphragm to complete diaphragm rupture, have been identified in about 10 percent of the units by the NIOSH field survey. Tests of the Scott apparatus by NIOSH showed reduced respiratory protection in the Demand-Mode and a loss of service time (but no loss of protection) in the Pressure Demand-Mode.
Notice to Licensees:
Many major-lic ensees use the types of Scott apparatus described above.
Users of the devices should take the following action:
1..
Establish a program for examination of the described res piratory devices in accordance with the attached NIOSH mailgram; or
- 2. Incorporate the provisions of the NIOSH mailgram into your current program for inspection of the described devices.
No written response to this Circular is required. If you require additional information regarding this subject, please contact the individual specified in the attached mnailgram.
Attachment:
MAILGRAM 7 9 06290W
0 ENCLOSURE 2 IE Circular No. 79-09 Date:
June 22, 1979 Page 1 of 3 LISTING OF IE CIRCULARS ISSUED IN LAST TWELVE MONTHS Subject HPCI Turbine Control Valve.Lift Rod Bending Inoperability of Multiple Service Water Pumps HPCI. Turbine Reversing Chamber Hold Down Bolting TiltingDisk Check Valves Fail to Close with Gravity in Vertical Position Limitorque Valve Actuators First.Date of Issue 6/30/78 7/10/78 7/17/78 7/24/78 7/26/78 Issued To All Power Reactor Facilities wi,th an Operating License (OL) or Construction Permit (CP) having a HPCI Terry Turbine All Power Reactor Facilities with an OL or CP, except those located in:
AL, AK, CA, FL, GA, LA, MS, SC All Power Reactor Facilities with an OL or CP having a HPCI Terry Turbine excepting Duane Arnold and Monticello All Power Reactor Facilities with an OL or CP All Power.Reactor Facilities with an OL or CP 78-17 Inadequate Guard Training/Qualification and Falsified Training Records 10/13/78 All Power Reactor Facilities with an Susquehanna 1 & 2, and Salem 2 Circular No.
78-12 78-13 78-14.
78-15 78-16 OL;
- Shoreham,
ENCLOSURE 2 IE Circular No. 79-09 Date:
June 22, 1979 Page 2 of 3 LISTING OF'IE CIRCULARS ISSUED IN LAST TWELVE MONTHS Subject First Date of Issue UL Fire Test 11/6/78 Manual Override (Bypass) 12/29/78 of*Safety Systems Actuation Signals Administration of Unauthorized Byproduct Material to Humans Failure of 120 Volt Vital AC Power Supplies Inadequate Guard Trai ning/Qual ification and Falsified Training Records Loose Locking Nut on Limitorque Valve Operators Moisture Leakage in Stranded Wire Conductors 1/12/79 1/16/79 2/23/79 3/16/79 3/20/79 Circular No.
Issued To All Power Reactor Facilities with an OL or CP All Power Reactor Facilities with a CP All Medical Licensees, except Tel etherapy Medical Licensees, and all Licensed Radio pharmaceutical Distributors All Power Reactor Facilities with an OL or-CP All Holders of and Applicants for Special Nuclear Material Licenses in Safeguards Group I All Power Reactor Facilities with an.
OL or CP All Power Reactor Facilities with an OL or CP 78-18.
78-19 79-01 79-02 79-03.
79-04 79-05
ENCLOSURE.2 IE Circular No. 79-09 Date: June 22, 1979 Page 3 of 3 LISTING OF IE CIRCULARS ISSUED IN
.. LAST TWELVE MONTHS Circular No.
Subject First Date of Issue Issued To Fai'lure to Use-Syringe and Bottle Shields in Nuclear Medicine Unexpected-Speed Increase of Reactor Recirculation MG Set Resulted in Reactor Power Increase Attempted Extortion Low Enriched Uranium 4/19/79 5/2/79 5/18/79 All Holders of Medical Licenses Except.Tel etherapy Licenses.
All BWR Power Reactor Facilities with an DL or CP All Fuel Facilities and Licensed Reactors 79-06 79-07 79-08
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Ob92 MLTN VA 05/02/79 M R JERRY CAPLIN US NRC WASHINGTON, DC 20555 RESPIRAJOR USERS WARNING THE NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH CNIUSM.) WANTS TO ADVISE USERS*OF SCOTT AIR PAK hI/IA AND PRESUR-PAK hI/hA SLLF-CONTAINED BREATHING APPARATUS OF THE OCCUJRRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS. NIOSH TEST-S INVE STlGATING THE EFFECT OF SUCH DEFECTS SHOW~ED REDUCED RESHIRAl URY PROTECTION ON DEMAND-MODE APPARATUS, THESE
= SAML TtSTS ALSO SHO~WED NO LOSS I-N PROTECTION, BUT A. LOSS IN SER'VICE TIME W.HEN IN TH-E PRESSURE DEMAND-MODE. NOTE: THE PREbSUNt DEMAND UNIT IS NOT APPROVED WHILE IN THE DEMAND MODE.; lAE DEMANLJ MODE IS TO BE USEU FOR DONNING PURPOSES ON LY, NIOSH bEGAN THIS INVESTIGAIION FOLLOWING THE RECENT DEATH OF THREE FIREFIGHTERS JmHO WERE REARING THIS TYPE OF RESPIRAJON, ALTHOUGH IT HAS NOT BEEN EST-ABLISHED THAT THE DEAIHS HEREH DUE TO DAMAGED REGULATOR DIAPHRAGMS. A SAMPLING OF THE APPARATUS
'IN THE FIELD HAS SHOHN AT LEAST 10% OF THE UNITS EXAMINED HAVE RUPTURED OR PUNCTURED
- DIAPHRAGMS, UbERS SHOULD EXAMINE THEIR SCOTT APPARATUS FOR POSSIBLE DAMAGED DIAPHRAGMS IN ACCOROANCE -WITH MANUFACTURER'S INSTRUCTIONS, THE USER SHOULD CHECK THE DIAPHkAGM BEFORE EACH USE bY CLOSING-BOTH THL MAIN LINE AND BYPASS VALVES AND BLO'WING THROUGH~ THE REGULATOR OUTLET PORT. IT SHOULD bE FOSSIOLE TO MAINTAIN A SLI.GHT POSITIVE PRESSURE IN THE REGULATOR. THE USER SHOULD) CHECK THE REGU'LATOR DIAPHRAGM AFTER EACH USE AND DURING MONTHLY INSPECTIONS O THE COMPLETE APPARATUS, IT IS NOT KNOWN IF FAILURE-OCCURS DURINU ASSL.M6LY, STOrkAGE, UR-USE OF.THE RESPIRATOR REGULATOR.
THEEFRE ETRMECAUSTION.MUST SE EMPLOYED P#HLN USING ME..
RESPIRATOR. IN CHLCKING THE"OPERATION OF THE RESPIRATOR, USERS ARE CAUTIONED-NOT TO'BLOCK THE FLO"' OF Alk FROM THE REGULATUk WHMEN THE bYPASS VALVE IS OPEN, BECAUSE SUBSTANTIAL ObSTRUCTION MAY kUPTURE OR DISLODGE THE DIAPHRAGM. IF THE USER OvSERVLS A LOOSE OR DISLODGED REGULATOR COVER, THE COVER MUST 6ELPV AN ;TI;E;)APmRAUMFINbPJCTED EPORE REASSEMBLY, T
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MAL A.
EE SE F R WE ER UMCNS TOLL -FREE FCit~;~R
PAGE. 2 11T 617 SOF THE REGULATOR, NIOSH HAS REUUESTED THE MANUFACTURER STOP ALL SALES OF THE RESPIRATOR PENDING DETERMINATION OF THE REASON FOR AND NECE.SSA. Y CORRECTIVE ACTION TO PREVENT DIAPHRAG-FAILURE, FOR FURTHER ILCHNICAL INFOR~MATION CONTACT: MR, RICHARD RONK, NIOSHP 94 CHESTNUT RIDUE ROAD, MORGANTOWNP WY 26505.
PHONE: (-"-1 599-7337, ANTHONY ROBBINS, M.
DIRECTOR, NIUSH ROCKVILLE MD (ARS RUEVFCZ 0-26-01-036883) 21:19 LST MGMLUMP M(1M