ML19225A273
| ML19225A273 | |
| Person / Time | |
|---|---|
| Site: | 07001201 |
| Issue date: | 06/22/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Silk E BABCOCK & WILCOX CO. |
| References | |
| NUDOCS 7907180725 | |
| Download: ML19225A273 (1) | |
Text
k l
[pa asag'o, UNITED ST ATES 8 s,, ffg* j NUCLEAR REGULATORY COMMISSION
~
REGION 11 9.T, M r
- 4'My 101 MARIETT A ST., N.W., SulTE 3100 o
ATLANTA, GEORGI A 30303
'%/
e JUN 2 219h_
In Reply Refer To:
RII:JP0 70-1201 Babcock and Wilcox Cocpany Attn:
Mr. Edmond J. Silk, Plant Manager Nuclear Materials Division Coc=ercial Nuclear Fuel Plant (ChTP)
P. O. Box 1260 Lynchburg, Virginia 24505 Gentlemen:
The enclosed Circular 79-09, is forwarded to you for infor=ation. If there are any questions related to your underotanding of the suggested actions, please not.'y the contact listed in the enclosure to the circular.
Sincerely,
.[ - Ja=es P. O' Reil Director
Enclosures:
1.
IE Circular No. 79-09 2.
Listing of IE Circulars Issued in Last Twelve Months e
n.
7907180725 345 0.58
i UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 June 22, 1979 IE Circular No. 79-09 OCCURRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS IN CERTAIN SELF-CONTAINED BREATHING APPARATUS Description of Circumstances:
The Nuclear Regulatory Co= mission (NRC) has been informed by mailgrme (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 frca 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 C:ott apparatus by NIOSH showed reduced respiratory protection in the Demand-M. de and a loss of service time (but no loss of protection) in the Pressure Demand-Mode.
Notice to Licensees:
Many major licensees 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 respiratory devices in accordance with the enclosed NIOSH ma11 gram; or 2.
Incorporate the provisions of the NIOSH mailgram into your current progran 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 enclosed mailgram.
Enclosure:
Mailgram 7906290237 345 059
wl c.
p un SA SWITCHING CTR v[#
]
~~'
PO 60X 430
...1 ;
- [2] 7_ J -g ;. * ;(, '_ / ;..i, :e,.. % wag ROMNEY,wv 2o757 hEL y i..
c-
==
1-056166U122014 05/02/79 ICS *A12139 NSHA 00592 MLTN VA 05/02/79 MR. JERRY CAPLIN USNRC MASHINGTQN, DC 20555 RESPIRA10R USERS WARNING THE NATIONAL INSTITUTE F0k OCCUPATIONAL SAFETY AND HEALTH (NIUSH) WANTS TO ADVISE USERS"0F SCOTT AIR PAK II/ IIA AND PRESUF-PAK II/ IIA SELF-CONTAINED BREATHING APPARATUS OF THE OCCORRENCES OF SPLIT OR PUNCTURED REGULATOR DIAPHRAGMS, NIOSH TESTS INVtSTIGATING'.TME EFFLCT OF SUCH DEFECTS SH0aED REQUCEO
_ =,RESPIRA10RY P"0TECTION ON'OtMAN0=H00E APPARATUS. THESE
'SAME TtSTS ALSO SH0nED NO LOSS IN PROTECTION, BUT A LOSS IN
^
_.. SERVICE TIME aHEN IN THE PRESSURE DEMAND-HODE. NOTE: THE E@gg PREbSURt DEMAND UNIT IS NOT APPROVED wHILE IN THE UEMAND tm CHhg,y MODE; iME DEMAND MODE IS TO BE USED FOR DONNING PUNPOSES
- ONLY, Q'Q3 EEP NIOSM cEGAN TMIS INVESTIGATION FULL 0 WING THL RECENT DEATH
~ZM OF THREE FIREFIGHTERS'ah0 aLRE SEARING THIS TYPL OF ED
[h[UQ RESPIRA10W, ALTHOUGN IT HAS NOT BEEN ESTABLISME0 THAT C#
TME DEAIMS aEHL DUE TO DAMAGED REGULATOR DIAPHRAGMS, A M
SAMPLING OF THE APPARATUS IN THE FIELO MAS SmonN AT LEAST
(
hh 101 0F 1HL UNITS EXAMINED MAVE NUPTURED OR PUNCTURED DIAPHRAGMS.
~
Q,;;
aLtery USEWS SMOULO EXAMINE THEIx SCOTT APPARATUS FOR POSSIBLE DAMAGED CIAPMRAGMS IN ACCORUANCE aITM MANUFACTUNER'S
(
)
INSTRUCTIONS. 1HL USEk SMUULO CMECK TME DIAPMkAGM BEFORE hg EACM U$t eY CLOSING'80TM THL MAIN LINE AND BYWASS VALVES AND EL0aING TMROUGM THE REGULATOR QUTLET PORT. IT SMOULO bE POSSleLE TO MAINTAIN A SLIGHT POSITIVE PkESSURE IN inE RtGULATUR. THE USER'SHOULO CHECK THL REGULATOR DIAPHRAGM AFTLE LACM USE AND oukING MONTHLY INSPECTIONS Of TME COMPLEit APPAkATUS. IT IS NOT KN0aN IF FAILURL bCCUNS DURING ASS:"oLY, ST0nAGE, UR'USE OF TML RESPIRATOR REGULATOR,
'hEdEFudE, txTREME CAUSTION MUST BE EMPLOYED aMtN USING
.NE RESPIRATOR. IN tMtCKING THE OPERATION OF TML RESPIRATOR, USERS ARE CAUTIONED'NOT TO SLOCA TML FL0a O' Alk FROM THE REGULATuk AMEN THE eYPAb5 VALVE IS OPEN, BECAUSE SUBSTANTIAL 345 060 UbSTRUCTION MAy kUPTURE Om DISLUDGE THE DIAPHRAGM. IF TME USt= UoSERytS A LOOSE Od CISLOOGED REGULATOR CUvER, THE COVER MUST e t J E =p v E D. A N D _.T M E. D }.A 5 5W AA M.IsbPECTED SEFUWE HEASSEaHLY
' b O' 8 3
1
/
PAGt 2
~g,:g,
f
~
~ ^
J n.
,~
-5'I/h./. EN'_S:i;_l'(~t ;..'C ', i. '.. ' -Y-?"
_-E-a
' b.
p 0F THE REGULATOR.
NIOSM MAS REGUESTED THE MANUFACTURER STOP ALL SALES OF THE RESPIRATOR PENDING DETERMINATION OF THE REASON FOR AND NECESSARY CURNECTIVE ACTION TO PREVENT OIAPMRAGA FAILURE.
FOR FUR 1hER ILCHNICAL INF UhM ATION CONTACT: MR. HICHARO RONK, NIOSH, 944 CHESTNUT RIDGE ROAO, MORGANT0nN, av 26505.
Pn0NE: ( 2 599-7337.
set
~
ANTMONY ROBb1NS, M.D.
DIRECTON, NIUSN RUCKVILLE MD (ANS HUEvFCZ 0-26-01-016683) 21:19 tST MGMCUMP MbM
(
t:_...f 345 061
,,.,,,..,,....x
r Enclosure IE Circular No. 79-09 Page 1 of 2 June 22, 1979 LISTING OF IE CIRCULARS ISSUED IN LAST TWELVE MONTES Date Issued To Circular Subject of Issue No.
78-10 Control of Sealed 6/14/78 All Medical Licensees in Sources Lsed in Radiation Therapy Categories G and G1
' 78-11 Recirculation M-G 6/15/78 All Holders of BWR OLs or cps Set Overspeed Stops 78-12 HPCI Turbine Control 6/30/78 All Holders of Valve Lift Rod Bending BWR OLs or CPe for plants with HPCI Terry Turbine 78-13 Inoperability of Multiple 7/10/78 All Holders of Reactor OLs and cps Service Water Punps except for plants located in: AL, AK, CA, FL, GA, LA, MS, SC 78-14 HPCI Turbine Reversing 7/12/78 All Holders of BWR Chanber Hold Down Bolting OLs or cps for plants with a HPCI Terry Turbine excepcing Duane Arnold and Monticello 78-15 Checkvalves Fail to 7/20/78 All Holders of Close In Vertical Reactor OLs or cps Position 78-16 Limitorque Valve 7/26/78 All Holders of Reactor OLs or Actuators cps 78-17 Inadequate Guard Training /
10/13/78 All Holders of Qualification and Falsified and applicants for Reactor OLs Training Records 78-18 UL Fire Test 11/6/78 All Holders of Reactor OLs or cps 345 062
Enclosure IE Circular No. 79-09 Page 2 of 2 June 22, 1979 LISTI':G OF IE CIRCULARS ISSUED IN Li3T TWELVE MONTHS Circular Subj ect Date of Issued to No.
Issue 78-19 Manual Override (Bypass) 12/28/78 All Holders of of Safety Actuation Signals cps 79-01 Administration of 1/12/79 All Medical Unauthorized Byproduct Licensees except Material to Humans Teletherapy Medical Licensees and each Radicpharmaceutical Suppliers 79-02 Failure of 120 Volt Vital 2/16/79 All Holders of AC Power Supplies Reactor OLs and cps 79-03 Inadequate Guard Training-2/23/79 All Holders of Qualification and Falsified and applicants Training Records for Special Nuclear Material Licenses in Safeguards Group I 7 9- 04 Loose Locking Nut on 3/16/79 All Holders of Reactor OLs or cps Limitorque Valve Operators 79-05 Moisture Leakage La 3/20/79 All Holders of Stranded Wire Conductors Reactor OLs or cps 79-06 Failure to Use Syringe 4/19/79 All Holders of and Battle Shields in Medical Licensees Nuclear Mecicine except teletherapy licensees 79-07 Unexpected Speed Increase 5/2/79 All Holders of of Reactor Recirculation BWR OL's or CP 's MG Set Resulted in Reactor Power Increase 79-08 Attenpted Extortion - Low 5/18/79 All Fuel Facilities Enriched Uranium Licensed by NRC 345 063