ML20091P794
| ML20091P794 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 01/28/1992 |
| From: | Gates W OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LIC-92-050S, LIC-92-50S, NUDOCS 9202040028 | |
| Download: ML20091P794 (2) | |
Text
-
.s
_ _ _ _- :. u
.._.._a___._
khhffhl' Omaha Public Power District 444 South 16th Street Mall Omaha, Nebra:ka 8102-2247 402/63& 2000 Januaq 28, 1992 LIC 92-050S U. S. Regulatory Commission Attention:
Lbcument Control Desk Mail Station:
P14 137 Washington, DC 20555
Reference:
Dr.ckat No. 50-285 Gentlemen:
SUBJECT:
Special Report on Inoperability of Wide Ranga lloble Gas Stack Monitor RM-063M for Post-Accident Monitoring The Omaha Public Power District (OPPD), holder of Operating License PPR 40, submits this report pursuant to the requirements of fort Calhoun Station (FC )
Technical Specification 2.21, " Post Accident Monitorit.g lustrimiitation".
Technical Specification 2.21, Table 2-10, item 2 requires that a minit im of one channel for each uists range noble be operable in Modes 1, 2, and 3. gas stack monitor RM 0631., RM-063M..id RM-063H If the number of oper atir channels is less than the minimum operable channels requirement, OPPD must e".her restore thq inoperable channels to operable status within seven days of the event, or prepare and submit a special report to the Comnission pursm.t to Tecinical Sprificai f an 5.9.3 within 14 days following the event.
On January 17, 1992, at 1425 hours0.0165 days <br />0.396 hours <br />0.00236 weeks <br />5.422125e-4 months <br /> with FCS operating in t. ode 1 at 86 neicent power, RM-063M was declared inoperable because tha rud.stion 'r9nitor d j r.9t meet the daily channel check requirements. With the mode switch in "Cilibrate", the RM-063M rate meter indication did not move to the " Cal ma k.
This itoperable condition was attributed to electronic drift.
RM-063M was initially declared operrble tjecause the problem wa.: felt to be only with the mechanical switch since the meter would sometimes ge tc the " Cal' i
position, but not consistently. Only upon tioubleshooting was it determined to be more than a switch problem. Thus, previous Daily Operational Surveillance Test Records were reviewed and bared or, the results of the previous channel checks, the RM-063M inoperable status was backdated to 2254 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.57647e-4 months <br /> on January 14, 1992.
920204002(r 920128 PDR MOCK 0500 5
,_ggy-m es.
V!
1
+
LIC-92-0505 i
i Page-Two The Maintenance Work Order to perform corrective action was issued and an electronic adjustment restored RM-063M to an operable condition. Thus, RM-063M was returned to service and the Limiting Condition for Operation (LCO) was exited on January 22, 1992, at 1536 hours0.0178 days <br />0.427 hours <br />0.00254 weeks <br />5.84448e-4 months <br />.
Upon declaring RM-063M inoperable, the a;plicable Technical Specifications (TS) were reviewed.
in accordance with TS Ta>le 2 10, footnote (a), a preplanned alternate method of monitoring the appropriate parameter was verified in place (i.e, normal-ran sampilng existed)ge stack monitors were operational and alternate methods for If you should _ have any questions, please contact me.
Sincerely, AV. Y,/../
W. G. Gates Division Manager Nuclear Operations WGG/lah c:
LeBoef, Lamb, Leiby & MacRae 1
R. D. Martin, NRC Regional Administrator D. L. Wigginton, NRC Senior Project Manager R. P. Mullikin, NRC Senior Resident inspector
-mv-,
e am-.
,e, e.
,,--a r7-,
-,.- m rn en y