ML20039D518
| ML20039D518 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Millstone, Monticello, Dresden, Peach Bottom, Fermi, Kewaunee, Saint Lucie, Point Beach, Grand Gulf, Arkansas Nuclear, Susquehanna, Turkey Point, Ginna, Farley, Sterling, Clinton, Cook, Quad Cities, La Crosse, Zion, 05000496, 05000497, 05000502, Crane  |
| Issue date: | 12/21/1981 |
| From: | Herd R THERMO ELECTRON CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-81-549-000, TASK-2.F.1, TASK-TM PT21-81-549, PT21-81-549-000, TAC-47626, TAC-47627, TAC-47697, TAC-47698, TAC-47768, TAC-47769, NUDOCS 8201050102 | |
| Download: ML20039D518 (5) | |
Text
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Post Oftice Box 2108 santa Fe, New Mex co 87501 (505)471-3232 TWX. 914985-0678 p \\ Mt q
December 21, 1981
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<1 Attention Director Gentlemen:
Eberline Instrument Corporation manufactures radiation monitoring equipment which is sold to the nuclear power facilities.
About a week ago, during our testing program, it was discovered that our micro computer based radiation monitoring systems have a design defect on' the micro computer printed cin:uit board.
The defect can potentially cause a loss of memoiy which resets all calibration parameters, including alarm trip levels.
Since this equipment was not sold as qualified or as safety related, there was
.some question as to whether this was in the realm of 10 CFR 21. However, in reviewing General Porvision paragraph.21.1, entitled "Puiii35e", of this regulation we felt that the defect 'tould create a possible safety hazard",
therefore, we immediately called Region IV and talked to Mr. Uldis Potapous,-
Chief Vendor Branch who concurred with us that we should handle the problem as l
outlined. in 10 CFR 21.
As outlined in paragraph 21.21, entitled " Notification of 10 CFR 21", we immediately informed the licensee or purchasers of our micro computer based radiation monitoring systems of the defect, whereupon we evaluated the deviation and outlined our corrective action with each of them.
The following part of this letter is our written report required by paragraph 21.21, section 3 and the fonnat corresponds to your sub-sections (1) thru (viii).
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Roger Herd Eberline Instrument Corporation President
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Eberline Instrument Corporation-Airport Rd/P.O. Box 2108 Santa Fe, New Mexico 87501 Equipment affected:
-cj Micro computer based radiation monitoring systems a)
Fixed Airborn Activity knitor (F.A. A.M.)
b)
Particulate, iodine, noble gas monitors (PING) series 2, 2A, 3 and 4.
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' Special particulate, iodine, noble gas mbnitor (SPING)
/N series 3 and 4.
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Control terminal, (CT) series 1 and 2. [^
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Portable terminal (PT) series 1..
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t Defective subassembly.is the Central Processing Urit (CPU III),
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Eberline Instrument Corporation sold:this type of equipment to the follow 2g licensee or purchaser, i
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American Electric Power D.C. Cook Nclear Power Station y
Indiana & Michigan Electric Co.
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2 Broadway New York, New York 10004
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Alabama Power Co.
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Farley m clear Power P.O. Drawer 470
-4 Ashford, AL 36312 v
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Argonne Mtional Laboratory j
9700 S. Cass Ave.
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Argonne, IL 60439 d)
Bechtel Power Corporation Arkansas Power Co.
P.O. Box 3965
' San Francisco, - CA 94119 i
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Baldwin Associates ^4' f) g
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ClintoSPower Stgtion
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Bechtel Power @rpdrat' ion Q
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wm h)/ liryli.nati Gas & Electric ip?
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- d. Qilumbus & Sobthern Ohio Elect.
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3 _ Moscow, Ohio l,161$3,,5, i
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Zion-t4;cleay Fowyr Station-Quad Cities % clear P6per Station 44
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- ;k j)_'Dairpland Power Corporation Genda, Wisconsior 54632 i
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2000 hecond Ave.nue
.U Detro'it, Mich'. > 48226
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. NPittsburgh, Penn. 15219 1,.'f s.-
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E G & G Idaho P.O. Box 1625
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Florida Power and Light Turkey Point Plant 4-Miami, Florida 33152 0)
St. Lucie Plant Jensen Beach, Florida 33457' l
'Page 4 Region IV p)
Metropolitan Edison Co.
Three Mile Island Wclear Co.
P.O. Box 542 Reading, PA 19640 q)
Northmst Wclear Energy Co.
P.O. Box 270 Hartford, Conn. 06101 r)
Northern States Power Co.
Monticello Wclear Gen. Plant P.O. Box 600 Monticello, MN 55363 s)
Pennsylvania Power & Light Co.
2 North 9th St.
Allentown, PA 18101 t)
Philadelphia Electric Co.
Peachbottom Station Delta, PA 17314 u)
Rochester Gas & Electric 89 East Avenue Rochester, N.Y.
14649 v)
Wisconsin Public Service Corporation 700 N. Adams Street Green Bay, Wisconsin 54305 w)
Wisconsin Electric Power Co.
231 W. Michigan St.
Milwaukee, Wisconsin 53201 iv)
There is a potential source of error in the interrupt structure of the central processing unit (CPU III) board.
If two ' interrupts of increasing priority occur sequentially, the interrupt data can be in a state of transition at the time it is being read by the microporcessor. This results in ern]neous data, and there is a complete loss of data and calibration parameters, v)
We determined that defect was a safety hazard 12/18/81.
vi)
Eberline Instrument Corporation shall be responsible to supply additional hardware in the form of a piggyback board containing a latch which prevents the interrupt data from changing while it is being read. These boards will be supplied to each purchaser outlined in section (iii) of this written report with complete ' instructions on n
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.Page 5 Region:IV how they are to install.them in each applicable unit. We have already sent some of these boards to' facilities which are online with -
the'whole corrective action program to be completed by the end. of ;
February 1982.
viii)
We have advised all of our purchasers or licensees by lette of how memory loss can occur.
This information is the same as noted in section (iv) of this report.
If the commission.needs any additional.information related to this defect-please let us know at once; Since yours, r' 2
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Edd;;j f
j bger Herd
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President
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