ML18029A898
| ML18029A898 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 09/18/1985 |
| From: | Shell R TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8510030068 | |
| Download: ML18029A898 (4) | |
See also: IR 05000259/1985025
Text
p~~IA TENNESSEE VALLEY AUTHORITY CHATTANOOGA.
TENNESSEE 37401 400 Chestnut Street Tower II Ep@September 18, 1985 48 U.S.Nuclear Regulatory
Commission
Region II ATTN: Dr.J.Nelson Grace, Regional Administrator
101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Dear Dr.Grace: Please refer to J.A.Domer's letter to you dated June 21, 1985, which contained our response to OIE Inspection
Report 85-25 for our Drowns Ferry Nuclear Plant.As a result of discussions
with Floyd Cantrell of your staff, we have revised our response to Violation 1.d, which is enclosed.If you have any questions, please get in touch with R.E.Alsup at FTS 858-2725.To the best of my knowledge, I declare the statements
contained herein are complete and true.Very truly yours, TENNESSEE VALLEY AUTHORITY R.H.Shell Nuclear Engineer Enclosure cc: Mr.James Taylor, Director (Enclosure)
Office of Inspection
and Enforcement
U.S.Nuclear Regulatory
Commission
Washington, D.C.20555An Equal Opportunity
Employer
~N-~Le II 0 II
REVISED RESPONSE NRC INSPECTION
REPORT NOS.50-259/85-25, 50-260/85-25, AND 50-296/85-25
DAVID M, VERRELLI'S
LETTER TO H.G.PARRIS DATED MAY 22'985 am Technical Specification 6.3.A.6 requires that detailed written procedures
covering surveillance
and testing requirements
be adhered to.Contrary to the above, Plant Standard Practice BF 14.25, Clearance Procedure, was not followed in that all electrical
power was not isolated from the 2DA low pressure coolant injection (LPCI)motor-generator
set under hold order 85-150A.The motor was removed with voltage (18 volts)still applied to the thermistor
leads.On April 23, 1985, the inspectors
observed that various indicating
lights were still illuminated
although hold order tags were in place.1.dmissi o'a o ed'o a'on TVA disagrees that this example is a violation.
2.eas F th i a The 2DA low pressure coolant injection (LPCI)motor generator (MG)set was-tagged to pull the generator for transport to Louis-Allis
Company for repair.The equipment was tagged in accordance
with Standard Practice 14.25 for this job.The electrical
maintenance
personnel felt the clearance was sufficient
and safe to do work, and the shift engineer issuing the clearance felt it was adequate to safely perform the work.Involved personnel were aware of limitations, conditions, and boundaries
of this clearance.
This meets the intent and purpose of BF 14.25.The 18-volt thermistor
power supply is shared with the 2EN LPCI MG set, and there is no way to provide isolation if the other MG set is to remain operable.The maintenance
personnel did not request.this circuit tagged because they could safely handle the wiring by lifting the leads"hot." This is commonly required and done on systems with common low voltage power supplies.This circuit was subsequently
tagged, but this was for NRC inspectors
concern rather than a safety concern of personnel doing the work.The basis of this violation is related to the wording of BF 14.25.Although we believe the directions
provided in the procedure were adequate, we have reworded BF 14.25 to unambiguously
assure a uniform understanding
on the clearance procedure.
~~1 Ev 1