ML20087K463
| ML20087K463 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 08/18/1995 |
| From: | Hutchinson C ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GNRO-95-00100, GNRO-95-100, NUDOCS 9508230308 | |
| Download: ML20087K463 (3) | |
Text
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' frG G# t h i v :n a t* cit August 18,1995 U.S. Nuclear Regulatory Commission Mail Station P1 137 Washington, D.C. 20555 l
Attention:
Document Control Desk
Subject:
Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 Reply To A Notice Of Violation Failure To Lock Open Valves 1C41-F002B and 1P11-F021 Report No. 50-416/95-11-01 (GNRI-95/00131), dated 07/25/95 l
GNRO-95/00100 Gentlemen:
Entergy Operations, Inc. hereby submits the response to Notice of Violation 50-416/95-11-01.
Yours truly,
/-
c DH attachment cc:
Mr. J. E. Tedrow (w/a)
Mr. H. W. Keiser(w/a)
Mr. R. B. McGehee (w/a)
Mr. N. S. Reynolds (w/a)
Mr. Stewart D. Ebneter (w/a)
Regional Administrator U.S. Nuclear Regulatory Commission Region li 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 f
Mr. Paul W. O'Connor (w/a) 220010 Office of Nuclear Reactor Regulation
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U.S. Nuclear Regulatory Commission Mail Stop 13H3 Washington, D.C. 20555 9508230308 950818 PDR ADOCK 05000416 G
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Attachment I t3 GNRO-95/00100 j*
Page 1 of 2
.l i
Notice of Violation 95-11 -,
' Technical Specification 5.4.1.a requires that written procedures be' established, implemented, and maintained covering the applicable procedures recommended in Appendix "A" ofRegulatory 1
l Guide 1.33, Revision 2.
- Regulatory Guide 1.33, Appendix "A", paragraph 4.d,'4.g, and 4.h, recommends procedures for the standby liquid control, reactor core isolation cooling, and emergency core cooling systems -
. respectively. The high pressure core spray system comprises one of the emergency core' cooling systems.
System operating instruction 04-1-01-C41-1, Standby Liquid Control System, Section 4.1, -
j attachment 1, specifies the standby mode of operation for this system and requires that the "B" -
j
' standby liquid control pump suction valve (IC41-F002B) be in the locked open position.
l System operating instructions 04-1-01-E51-1, Reactor Core Isolation Cooling System, and 04-1-01-E22-1, High Pressure Core Spray System, Section 4.1, attachment 1, specifies the standby mode of operation for these systems and requires that the condensate storage tank supply valve (IPl1-F021) to the high pressure core spray and reactor core isolation and cooling systems
]
be in the locked open position.
i Contrary to the above,
'l On June 29,1995, valve IC41 F002B was not locked in the required open position.
- 2. On July 5,1995, valve IPl1-F021 was not locked in the required open position.
l I.-
Admission or Denial of the Allested Violation
]
Entergy Operations, Inc. admits to this violation.
i 11.
The Reason for the Violation. If Admitted l
On June 29,1995, a resident inspector tour of containment revealed that the locking device for the "B" standby liquid control pump suction valve (1C41-F002B) was not properly secured. An operator was notified and a locking device was subsequently
)
attached, On July 5,1995, the inspector also found the High Pressure Core Spray (HPCS)/ Reactor Core Isolation Cooling (RCIC) supply valve from the Condensate i
Storage Tank (CST) (IPil-F021) not locked open. As a general practice, GGNS uses I
plastic tie-wraps to fulfill the requirement oflocking valves in place.
j
'i
. System operating instructions require that the aforementioned valves be locked open.
' Although the inspector found both valves in the correct position, the associated locking.
' device was not properly attached.~ This constituted a failure to implement the l requirements of Emergency Core Cooling System (ECCS) operating procedures.
a
P.-
w-Attachment I t) GNI10-95/00100 Page 2 of 2 The cause of this condition is the inappropriate reuse of tie-wrap locking devices with m*
broken retaining clips.
i i
III.
Corrective Stens Which Have Been Taken and Results Achieved -
The tie-wrap locking devices were replaced with new tie-wraps on the two valves in question.
All accessible safety related locked valves were checked and the locking devices replaced with new tie-wraps as necessary.
I Using Night Orders and pre-shift briefings, the operators were briefed on the importance of using properly installed locking devices. They were also directed not to re-use tie-wraps for locked or throttled valves.
IV.
Corrective Steps to be Taken to Preclude Further Violations The Operations Training Review Group (TRG) will evaluate the need for periodic e
licensed and/or non-licensed operator training related to the requirements for locking valves.. This training should include specific restrictions on reuse of a tie-wrap locking device unless that device is designed for reuse.
V.
Date When Full Compliance Will be Achieved The above actions shall be completed by September 28,1995.
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