ML20214V282
| ML20214V282 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 09/26/1986 |
| From: | Barkhurst R LOUISIANA POWER & LIGHT CO. |
| To: | Martin R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| SR-86-005-00, SR-86-5, W3A86-0095, W3A86-95, NUDOCS 8610020224 | |
| Download: ML20214V282 (4) | |
Text
l 0UISIANA P O W E R & L I G H T! WATERFORO 3 SES + PO. BOX B + KILIDNA, LA 700664751 soaneoW u
s September 26, 1986 l
l W3A86-0095 A4.05 QA Mr. Robert D. Martin Regional Administration, Region IV U.S. Nuclear Regulatory Commission 611 Ryan P1nza Drive, Suite 1000 Arlington, TX 76011
Subject:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 Reporting of Special Report
Dear Mr. Martin:
Attached is Special Report Number SR-86-005-00 for Waterford Steam Electric Station Unit 3.
This Special Report is submitted per Technical Specification 6.9.2.
Very truly yours, w
R.P. Barkhurs Plant Manager - Nuclear RPB/LWL/wp Attachment cc: NRC Document Control Desk NRC, Director, Office of I&E G.W. Knighton, NEC-NRR J.ll. Wilson, NRC-NRR
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NRC Resident Inspectors Office i
INPO Records Center (J.T. Wheelock)
B.W. Churchill W.M. Stevenson gdOO 224 860926 S
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SPECIAL REPORT SR-86-005-00 Primary and Secondary Heteorological Towers (on Separate Occasions) Were Inoperable for Creater Than Seven Days INTRODUCTION In order to obtain meteorological data Waterford Steam Electric Station Unit 3 has two (2) meteorological towers. The towers, the Primary and Secondary Meteorological Towers, are equipped with the instrumentation needed to measure wind speed, wind direction, and differential temperature. The operability requirements for the towers are specified in Technical Specification 3.3.3.4.
On September 9, 1986 and September 17, 1986 the secondary and primary towers respectively, were removed from service. However, in both cases the towers were not returned to service in seven (7) days as specified in Technical Specification 3.3.3.4a.
Therefore, this report is being submitted pursuant to Technical Specification 6.9.2.
NARRATIVE On September 9, 1986 Waterford Steam Elcetric Station Unit 3 was operating at approximately 98% reactor power when maintenance personnel were attempting to restore the two instrument booms on.the Secondary Meteorological Tower to the normal positions of 33 and 199 feet. While raising the booms with the hoist, the hoist cable broke. Since the wind speed, wind direction, and temperature instrumentation are attached to the booms, the instrumentation was damaged when-the hoist cables broke and the booms fell. As a result, at 0941 hours0.0109 days <br />0.261 hours <br />0.00156 weeks <br />3.580505e-4 months <br /> on September 9, 1986 operations personnel declared the secondary tower inoperable.
1
S An evaluation of the cable revealed that the cabic broke due to corrosion damage. The tower is located in an open field and the cabic is exposed to the natural elements as well as normal chemical emissions from the adjactnt chemical plants. This environment, over the years, corroded the cable such that it broke during operation. Louisiana Power & Light requested the assistance of the tower manufacturer Belfort Instrument Company. The manufacturer recommended that the cables on both the primary and secondary towers be replaced with stainless steel cable. Louisiana Power & Light ordered the cable, as well as the parts damaged as a result of the fall.
On September 13, 1986 maintenance personnel i
attempted to install the equipment, however, the signal cable for the anemometer was not long enough for installation. Maintenance personnel began looking for a cable of the proper length, but could not find one in time to restore the secondary tower to service within seven (7) days as specified in Technical Specification 3.3.3.4a.
The secondary Meteorological Tower was repaired and returned to service at 1745 hours0.0202 days <br />0.485 hours <br />0.00289 weeks <br />6.639725e-4 months <br /> on September 16, 1986.
At 0620 hours0.00718 days <br />0.172 hours <br />0.00103 weeks <br />2.3591e-4 months <br /> on September 17, 1986 (following the repair of the secondary tower), maintenance personnel removed the primary tower from service to make-repairs similar to those described above. The manufacturer initiated steps to replace the steel cables with the new stainless steel cables.
Since the electrical cables were showing signs of wear, maintenance personnel ordered new electrical cables for the above described instrumentation. The electrical cables arrived on-site on September 23, 1986, however, maintenance personnel observed that the cable for temperature instrumentation was missing from the i
i delivery. Maintenance personnel imnediately reordered the cable, however, it did not arrive in time to restore the primary tower to service within seven (7) days specified in Technical Specification 3.3.3.4a.
The primary tower is expected to be returned to service by September 29, 1986.
During the time period in which the secondary tower was out of service, the primary tower was operable and capable of monitoring the appropriate meteorological conditions. When the primary tower was removed from service the parameters which are required to be operable at the 199 feet elevation (wind speed and direction) were not being monitored by the secondary tower.
Nowever, the instrumentation on the primary tower was available and could have t
been used if needed.
(Maintenance personnel would have to raise the booms and calibrate the instruments.) Therefore, the removal of the towers from service did not have an adverse affect on the health and safety of the public.
2 l
PLANT CONTACT T. Smith, Maintenance Superintendent, 504/464-3138 3