ML20205F602
| ML20205F602 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 03/23/1987 |
| From: | Morgan R CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| RNPD-87-1228, NUDOCS 8703310211 | |
| Download: ML20205F602 (2) | |
Text
=
CP&L Carolina Power & Light Company ROBINSON NUCLEAR PROJECT DEPARTHENT POST OFFICE BOX 790 HARTSVILLE, SOUTH CAROLINA 29550 March 23, 1987 I
Robinson File:
13510H Serial: RNPD/87-1228 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET No. 50-261 LICENSE NO. DPR-23 14-DAY SPECIAL REPORT OF AN INOPERABLE RADIATION MONITOR
Dear Sir:
Carolina Power and Light submits this 14-Day Special Report as required by Technical Specification 3.5.1.3 concerning operational safety instrumentation used to assess Plant conditions during and following an accident.
Technical Specification 3.5.1.3 references Table 3.5-5 which requires, in part, that a minimum of one Noble Gas Effluent Monitor per Steam Line shall be operable. If one Noble Gas Monitor (per Main Steam Line) is not operable when the Reactor Coolant System (RCS) is above 350*F, it shall be restored to an operable status within seven days or a Special Report to the Commission shall be prepared and submitted within the following fourteen days. This Special Report shall detail the cause of the inoperable channel, the actions being taken to restore it to an operable status, the estimated date for completion of the repairs, and any compensatory action being taken while the channel is inoperable.
The Noble cas Effluent Monitors on the Main Steam Lines provide indication in the Control Room and alarm to warn the operator of high radiation in the Main Steam Effluent.
CAUSE On March 2, 1987, the Noble Gas Effluent Monitor for "B" Main Steam Line was declared inoperable at 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br />. The cause of inoperability was a defective detector.
l O
(
$0033A00Ck0$00h1 gv s
fp
_=
Sarials RNPD/87-1228 P:go 2 CORRECTIVE ACTION The detector was replaced, the high voltage for the detector was adjusted, and the system was checked for proper operation. A calibration was satisfactorily performed on the monitor on March 6, 1987. However, the channel would not satisfy the source check required to declare the channel operable. Additional troubleshooting identified a defective check source. By the time a new test source could be fabricated, the seven days had been exceeded. The channel was cut-of-service a total of 10 days and returned to service on March 12, 1987, at 1347 hours0.0156 days <br />0.374 hours <br />0.00223 weeks <br />5.125335e-4 months <br />.
If you have any questions concerning this submittal, please contact my staff or me.
Very truly yours,
\\
k R. E. Morga
\\
Ceneral Manager H. B. Robinson S. E. Plant RCA:leh cc:
J. N. Grace H. E. P. Krug l
1
-.. -.. -. _