IR 05000361/1983008
| ML20126A663 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/10/1983 |
| From: | Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Book H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML20126A656 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, RTR-NUREG-737-C, TASK-2.B.3, TASK-2.F.1, TASK-TM NUDOCS 8506130420 | |
| Download: ML20126A663 (3) | |
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NUCLEAR REGULATORY COMMISSION
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March 10,1983
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EEMORANDUM FOR:
E. L. Jordan, Director
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Division of Engineering and Quality Assurance
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H. E. Book, Acting Director
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Division of Radiological Safety and Safeguards ? ogra=i.
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Reg' ion V
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SU3 JECT:
INSpICTION TIED 3ACK: hJEEG-0737 ITDiS II.B.3 and II.F.1 A recent inspection (Inspection Report No. 50-361/83-08) performed pursbant to T.I. 2515/44 Rev. 2 identified several conditions which have potentially generic i= pact.
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11.7.1, Attachnent 1. Noble Gas Effluent Monitor
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Southern Califor=ia Edison Co=pany (SCE) has installed several Wide Range Gas Monitors (WRCM) supplied by General Ato:ics Cc:pany at the
San Onof re Nuclear Generating Statien.
The licensee has identified
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f our specific proble=s which have potentially generic i: pact on users of this equipment.
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1.
Vender calibration data for the lov range detector was apparently in error.
D'ata from topical report, " General Ato:ic
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RD52, E.-113-647" was not consistent vith onsite calibrations.
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We understand a new calibratio= report has been prepared by the vender, but to our knowledge is not yet generally available.
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Vendor calibration data for the high range detecter " General 4
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Ateric ED-72. E-255..e61" was also incensistent with licensee
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ensite calibrations.
The licensee believed the cause vas
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f ailute of the vendor to install a spacer which preperly
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positions the CdTe detector. We vere informed that the vender has again perforned the type calibration of the RD-72.
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An apparent vender 1.-iring error and sof tvare deficiency resulted in the vreng stack area being used to calculate effluent concentrations.
This de:icnstrates the potential
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vulnerability of sof tvare aspects.
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4.
During elect:cnic testing of the * KGM, the licensee discovered ~
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that an ocillatien cf activity signal can result in "cid/high ra:ge pump failure alars" atd icss cf ra:ge overlap.
General Arc =ics, issued 71 eld ChanEe Orde: 34 to ccrrect this proble.
It should be noted that' the lice:see sub=itted a 10 CTR 50.55(e)
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repert dated July 21, lee 2 regarding ite=s 1, 2, an8 3 above.
f Eevever, since any one of the p:chle=s identified could result in 8506130420 850604 PDR ADOCK 05000206 i
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erroneous results, and since many of the WRCM have been sold to,
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licensees, we wanted to highlight those conditions to you.
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3. * II.'F.1. Attachment 3. Containment High-Range Radiation Monitor
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SCE has lustalled the General Atomics Company Model RD-23 Eigh Range Radiation Monitor.
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Too separate channels feed a single panel
alarm in 'the control room.
Each instrument has a range ~ from 10E0~ to
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10E8 R/hr.
Technical Specifications require an alars set peint of
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2 R/hr.
Each detector has an internal source which produces an
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equivalent background of 1.0 R/br.
By virtue of their location and
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instrument characteristics one of the two channels is' constantly in the alarm mode.
With one channel in alarm, the panel alars remains acknowledged and essentially ignored by the operator.
A real alarm from the other channel cannot be activated with one channel schorledged.
The real problem seems to be an unnecessary Icv (2 R/br) alarm set
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point required by Technical Specifications.
We understand the
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2 R/hr alarm level is generic.
It is not clear why a high range
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pest accident monitor needs to have an alarm setting cf 2 R/hr.
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11.3.3 Post-Accident Sampling Capability
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C SCE has installed a Combustion Ingineering Cenhany Post Accident Sa=pling System (PASS).
The licensee has expanded significant resources (approximately 8-niillion dollars, 115,000 nan-hours) which
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have not yet; resulted in a reliable,syste= capable of performing the
i= tended fun,ction.
From our involvement in this case and
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discussions with some other Regional offices, licensees and certain MGt representatives, we believe there could exist a generic prob'lem n
with the acceptable development and operatien of PAS syste=s (at
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least vith Ccubustien Engineering syste=s).
In additien, in the l
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case of San Onof re 2 and 3, a license conditien ' requires the PAS
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syste= to be' operable.
Yet the Technical Specificatien associated
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h with the PAS system is an administrative requiren,ent that contains
no " limiting condition of operatien,"" action" statene'nts or specific
" surveillance" requirements.
A definitica of " operable" also does not exist in the context of the ?AS systen.
Thus the licensee is placed in a situation wherein anytime a full or partial PAS systen failure occurs, he must shutdown the reactor or continue reactor
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operation in known violation of a license conditics.
We do not know whether a similar license conditien exists in other recently
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licensed facilities or whether it vill exist for oper,ating
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f acilities c:ce they cesplete the 'iasta11stien cf their ?AS systens.
In any event, the circunstances at SCNCS 2 and 3 varrant 1:ternal reviev of NEC's intent of license requirenants and Tec Specs '
relati:s to Pl.S systetis.
In additien, we have been u:able te find any precise position en the part of ERC of the " safety 1,rignificance" of PAS 'systens.
They have been declared nen-rafety related but the safety sigdificance of the systen remains undefined.
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submitted in the spirit of II Manual Chapter
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We would be pleased to discuss -
findings with your representative.-
Greg Tuhas is."-
ved. He can be reached.at TIS 463-3748 should
,ons.
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E. I. look, Acting Director
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Division of F.adiological Safety
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and Safeguards Programs
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