ML20079P027
| ML20079P027 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/14/1983 |
| From: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| RO-83-010, RO-83-10, NUDOCS 8303040502 | |
| Download: ML20079P027 (2) | |
Text
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$5 SAN ONOFRE NUCLE AR GENER ATING S T A TION
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H. B. R AY TELEPHONE February 14, 1983
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U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement '
Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention:
Mr. R. H. 'Engelken, Regional Administrator
Dear Sir:
Su bject: Docket No. 50-361 and 50-362 Prompt Report Licensee Event Report No.83-010 (Docket No. 50-361) l San Onofre Nuclear Generating Station, Units 2 & 3 Pursuant to Section 6.9.1.12.b of Appendix A Technical Specification to Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, this sutmittal provides the written confirmation of our i
February 11, 1983 prompt notification to the NRC of a reportable occur-l rence involving the Control Room Emergency Air Cleanup System (CREACUS).
L On February 8,1983, at 0530 while Unit 2 was in Mode 1 and Unit 3 was in Mode 4, CREACUS Train A was declared inoperable for damper inspection and Limiting Condition for Operation (LCO) 3.7.5 was invoked.
The l
Action Statement associated with this LCO allows operations to continue for up to seven days before requiring Train A to be restored operable or initiation of cooldown. On February 11,1983, at 0200 while Unit 2 was in '? ode 1 and Unit 3 was in Mode 5, CREACUS Train A was tested and based on its inability to develop a positive pressure of 1/8" water gauge in the Control Room, Train A remained inoperable.
At 1745 while Unit 2 was in Mode 3 and Unit 3 was in Mode 5, CREACUS Train B was tested and was also declared inoperable. Since LC0 3.7.5 does not address the inopera-bility of both trains, LC0 3.0.3 was invoked and plant cooldown was initiated.
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s tir. R. H. Engelken February 14, 1983 Since the occurrence involves a shared syste:n between Units 2 and 3, in accordance with NUREG-0161, a single Licensee Event Report (LER) for Unit 2, LER 83-010 (Docket No. 50-361) will be provided by February 25, 1983. This LER will include the results of investigation of this occurrence.
Public health and safety were not affected during this event.
If there are any questions regarding the above, please contact me.
t Sincerely, l'hb l flA42h cc:
A. E. Chaffee (USNRC Resident Inspector, San Onofre Units 2 & 3)
R. J. Pate (USNRC Resident Inspector, San Onofre Units 2 & 3) i I
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