ML20237L360
| ML20237L360 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/20/1987 |
| From: | Zech G NRC OFFICE OF SPECIAL PROJECTS |
| To: | |
| References | |
| PNO-OSP-87-008, PNO-OSP-87-8, NUDOCS 8708280070 | |
| Download: ML20237L360 (1) | |
Text
1 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-0SP-87-08 This preliminary notification constitutes EARLV notice of events of POSSIBLE safety or public interest significance.
The information is as initially
)
received without verification or evaluation, and is basically all that is known by the Office of Special Projects on this date.
FACILITY:
Licensee Emergency Classification:
Tennessee Valley Authority Notification of Unusual Event l
Sequoyah Units 1 & 2 Alert
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Docket Nos. 50-327/50-328
- ~ Site Area Emergency i'
Soddy-Daisy, Tennessee General Emergency X Not Applicable l
SUBJECT:
COMPLETION OF AS-BUILT PORTION OF IDI INSPECTION AT SEQUOYAH NUCLEAR POWER PLANT i
The Office of Special Projects has completed the as-built portion of its 1
Integrated Design Inspection (IDI) of the Essential Raw Cooling Water (ERCW) system at TVA's Sequoyah Nuclear Power Plant. This inspection consisted of i
in-plant reviews in the electrical, mechanical, civil, structural and instru-mentation and control disciplines.
It was conducted to verify that the ERCW l
system, as currently constructed and installed, is in accordance with applicable I
drawings and system design specifications.
l The staff did not identify major deficiencies in the ERCW system.
- However, certain specific deficiencies identified by the staff must be corrected and the generic implications of these findings must be addressed by TVA prior to startup of Sequoyah Unit 2.
Some of the findings with potential generic implica-tions involve discrepancies in electrical distribution and cable conduit routings, an uncontrolled modification, disablement of system safety features without an appro-1 priate analysis, and the absence of controls associated with small in-line valves to ERCW components and instruments.
l In an exit meeting conducted on August 19, 1987, TVA indicated that the individual deficiencies did not appear to involve any significant safety impact. The j
staff will review TVA's proposed resolution and corrective actions after TVA has completed its review and evaluation.
The inspection report for the as-boilt inspection portion of the IDI will be issued in mid-September. The IDI reviews are scheduled for completion in September, with the identification of restart issues by October 9, and a final report issued by about November 6, 1987.
This PN is being issued because of the high level of interest in the IDI effort.
Media interest in this matter is expected.
I 1his information is current as of 4:00 p.m. (EDT) on Auguct 20, 1987.
CONTACT:
Gary G. Zech, 242-5526 DISTRIBUTION:
H Street MNBB Phillips E/W Willste Mail Chairman Zech ETif NRR DTP NMSS XDF:'DMB Comm. Roberts PA 01A RES DOT: Trans Only Comm. Bernthal MPA AE0D Applicable State Comm. Carr ES NRR l
Comm. Rogers OGC Air Rights INP0 d
SECY NRR
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ACRS e708280070 070820 GPA Regions:
PNO-D (Reactor Licenses) ~
Applicable Resident Site
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