ML20118B219
| ML20118B219 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear, Crystal River, Crane  |
| Issue date: | 09/23/1992 |
| From: | Taylor J BABCOCK & WILCOX CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-PT21-92 JHT-92-207, NUDOCS 9210010153 | |
| Download: ML20118B219 (6) | |
Text
,
SW BSW NUCLEAR TECHNOLOGIES 3" 0" h"* ""dd JitT/ 92-2 07 g,gg,y ((,[ja September 23, 1992 Teleptaw HOK185 POOO le!enW WLL3Hb 3t;G3 Document Control Desk I
U.
S. Nuclear Regulatory Commission Washington, DC 20555 l
Subject:
Potential Safety Issue Regarding Operational Amplifiers
Reference:
Letter to NRC Document Control Desk from J.
11. Taylor (JIIT/ 9 2 -19 8 ), dated September 17, 1992; name subject.
Gentlemen:
In the referenced letter, B&W Nuclear Technologies advised of an issue that may have safety implications.
Three attachments were mentioned in this letter as background, but were inadvertently omitted. We are, therefore, transmitting the following attachments at this time.
1.
Letter from Bailey Controla Company, dated May 4, 1992.
2.
" Attachment A" 3.
" Attachment B" Please include the above three attachments with our letter of September 17, 1992.
If you have any questions concerning this matter, please contact me at 804/385-2817 or Dave Mars at 804/385-2852.
Very truly yours,
)!
g
, f~. \\ O A d'l3 's ) }g g J. II. Taylor," Manager Licensing Services Jilt /bcc cc:
w/ Attachments W.
M.
Sample, Duke Power Company E.
C.
Caba, Toledo Edison Company R.
C.
Widell, Florida Power Corporation M.
W. Laggart, GPU Nuclear Corporation C.
R.
Gaines, Entergy Operatim s, Inc.
B.
S.
Schofield, Tennessee Va toy Authority L.
C.
Oakes, Washington Public Power Supply System E.
E. Mahoney, Bailey controls Company F.
C.
Sillag, Bailey Controls Company F
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- cre :216) 585-4500
- Tees: 980621. Fas:(216) 943 46C9 4 May, 1992 Babcock & Wilcox 3315 Old Forrest Road Lynchburgh, VA 24506 Attention:
Mr.
C.
W.
Pryor Safety Concern Report SCR-065 Stbject:
Dear Sir:
series modules A potential deviation associated with some 88 manufactured by Bailey controls Co. has been identified.
Safety Concern Report (SCR-065) explains the potential devittien i
It concerns operational nd the recommended corrective action.11fiers which may have been used T
Babcock & Wilcox for several plants.
Since this potential deviation may exist in some modules bu This possible condition should be repaired since 1983, corrective action as appropriate.
Due to our limited reviewed for impact on safety of plant operations. knowledge notified the NRC of this potential deviation.
You are advised that this notification discharges Bailey's obligation with respect to our Quality Assurance procedures and 10CFR21.
Sincerely, BAILEY CONTROLS COMPANY 22M6g' -
E.
E. Mahoney Director, Quality Assurance J. R.BOHART MAY 111992 attachment
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'\\7 TTY CONCERN REPORT SCR-065 4 May 1992 l
original In compliance with our Quality Assurance Program, we are notifying you of a pctantial deviation associated with operational amplifiers used in some 88_ series modules.
A potential deviation is a departure from technical requirements set forth in Bailey specifications which results in a reduction of the prescribed functional capability of equipment previously supplied as a basic This notification should facilitate the discharge of your component.
obligations as you deem necessary.
Several modules use a particular operational amplifier to drive the output load, operational amplifiers manufactured by National Semiconductor as part number LH0044CH may not be capable of driving the full rated load of the modules under all operating conditions.
It is possible that a mooule may perform satisfactorily in bench or system tests, but perform marginally under conditions of full load and One module was found by factory test to be elevated temperature.
Circuit incapable of reaching 100% output at the maximum rated load.
in other modules.
analysis indicates that this condition may exist You should evaluate the significance of this possible condition in the operation of your facility and take appropriate action.
is recommended that circuit board assemblies contained in dules on the attached list be inspected for presence of the National It It is recommended that modules found to semiconductor th0044CH part.
for replacement contain this part be returned to Bailey Controls Co.
and ratest.
an operational amplifier made by Burr-Brown (BB)
Prior to 1984, In 1984 and later, operational amplifiers made by either or Precision Monolithics Inc. (PMI) was used.
National Semiconductor (= or NS)
Parts made by Burr-may have been used in new modules or repairs. Brown or Precision rated to drive the full load under all conditions.
attached list are not of concern.
You are advised that this notification discharges Bailey's obligation to report safety concerns with respect to our Quality Assurance procedures and 10CFR21.
(D1A
/
E.
E. Mahoney Director, Quality Assurance
List of Affacted Modules & Assemblies PROSC 6065 MODULE Medule Part i Assembly Assembiv Part i Auctioneer 6626435A*
Auctioneer 6626430A1 output Stage 6626432A1 Buff 2r Amplifier 6621670BE******
Prime output 6621676F1 Log. Amplifier 6622280A*
Output Stage 6622374A1 6622280C*
6622280J*
Linear Amplifier 6621720A**1 Fine Gain & output 6621711F1 6621720A*=1*
6621720J**'
6621720R*
6621720A*=2 Fine Gain & Output 6621711A2 6621720A**2*
6621720J**2 662172 0R* *2 sled Diff. Amp.
6628873A*****
Input Stage 6628864E1 output Stage 6628866Al
- nal Converter 662373751 thru B4 0-100 MV Amp.
6623732C1 output Buffer 6623734A1 6623737Al thru A4 Output Buffer 6623734A1 6623737?.
aru A8 0-100 MV Amp.
6623732C1 Output Buffer 6623734A2 6627752A1 6627755Al***
Output Summer
.6622750C1 6627755Cl***
Summer 6627752A1
-Output 6623734A1 6629453A***
output Buffer Signal Converter 6629453A****
6633990A1 6633987A*
Output Buffer Signal Converter Isolation Board 6635146Al-Universal Test 6635140A*
Isolation Board 6635146Al Univ. Auctioneer 6635150A**
in the part suffix indicate that characters in ste:
Asterisks (*)
nese positions are not significant.
~
S_afety Concem Her->r1LSCR-065) Modules (*)
[pnimLN1 Dais Customer Customer PO Iyrs Qan
.q.
Description BCCo P/N BWNS P/N o
b i
Auctioneer 6626435A2 1006716-001 788-7473080 J/23/90 AP&UANO-1 217914 Order Safety I
Log Amp 6622280C2 1104245-001 788-7612025 4/11/89 GPUN/TMI-I T.P. 077014 Repair Safety (l)
I Linear Amp 66217203101 1104237-001 788-268041
$/02/84 GPUN/TMI-I 112132 Order Safety Linear Amp 66217201101 1104237-001 788-7612073 12/18/90 GPUN/FMi-1 0100104 Repair Safety (1) i Linear Amp 6621720]lIi 11042384X)1 788-7472168 10/31/91 FPC/CR-3 F771134D Repair Safety (1) 2 Lines <
6621720J211 1210035-001 788-7472168 10/31/91 FPC/CR-3 F771134D Repair Safety (l)
I Linear Amp 6621720 Rill 1006148-001 788-268136 9/22/86 GPUN/TMI-I T.P. 039513 Order Safety I
Linear Amp 6621720 RIH 1006148-001 788-268163 3/03/87 GPUN/FMI-I T.P. 051032 Order Safety 0100MV Amp 6623732Cl 1006971-004 788-268130 8/21/86 GPUN/TMI-I T.P. 043201 Order Non-Safety i
Sig. Cond. ' Temp) 662373/81 1006972-001 788-268139 10/28/86 GPUN/TMI-I T.P. G10681 Repair Safety (1) 2 Sigc Cond. (Temp) 6623737B2 1006971-001 788-7612025 4/11/89 G PUN /FMI-I T.P. 077014 Repair Safety (l)(2)
According to BWNS/NPC records, the Modules /Assemblica listed above are the only ones effected by SCR-065.
n IlWNS records indicate that the questionable OP-AMP was Im1 replaced as part of the repair effort.
(1) one Signal Conditioner Module had an operational Amplifier (PC4-ICl) replaced as part of repair effort.
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List of Affected Modules & Assemblies
" ' * * ***"'* LL*
R7s pac nFxs MMuls tiodulr_hrLi Autubly Masakly_Ent_1 Auctloneer 662o435A+
Auctloneer 6626430A1
! J l
I Output Stage 6626432A1 l
Buffer Amplifier 66216)oBE******
Prime Output 6621676F1
[y Log. Amplifier 6622280A*
Output Stage 462237eAl
[
6622280C*
6622280Ja L Nc4 A near Amplifier 6621720J'*1 Fine Gain & Output 6621711F1 g,
scaled Diff, Anp.
6628873A*****
Input Stage 6628864E1 4
3 Output Stage 6628866Al l
[
Summer 6627755Cl***
Summer 6622750C1 4
l Output 6627752A1 j
i l'
Signal Converter 6629453A***
Cutput Buffer 6623734A1
/g i
6629453Aa***
Note: Asterisks (*) in the part suffix indicate that characters in these positions are not significant.
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