ML20086B977
| ML20086B977 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/28/1995 |
| From: | Hutchinson C ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-10, NUDOCS 9507060210 | |
| Download: ML20086B977 (3) | |
Text
_ _ _
Ent:rgy Cp;rctlins, Inc.
~.
ENTERGY e.o so 756 Ptet Gbson. MS 39150 Tei 601437 2800 C. R. Hutchinson Vre Presdent t
Opntons Gryd GA N4kw Sta'on i
T
]
U.S. Nuclear Regulatory Commission Mail Station P1-37 i
Washington, D.C.
20555 Attention:
Document Control Desk i
Subject:
Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29 Generic Letter 89-10 Closure GNRO-95/00072 i
Gentlemen:
Pursuant to Generic Letter 89-10, ' Safety-Related Motor-Operated Valve (MOV) Testing and Surveillance", Item 1, Entergy Operations, Inc. is submitting this letter as notification that Grand Gulf Nuclear Station (GGNS) has completed actions necessary to satisfy commitments made in relation to this generic letter. These actions are sufficient to address the concerns raised in Generic Letter 89-10 regarding Mov performance problems. Program implementation documentation is available for review as required. The following briefly recounts these actions.
A comprehensive design basis review was performed for each MOV that included reassessment of system flow conditions, electrical supply capability, actuator / valve capability, and thrust / torque requirements.
Design documentation has been revised as found necessary during this review.
All program Movs have been tested under static conditions at least once to verify the control switch setting results in an acceptable amount of delivered torque or thrust at control switch trip. The settings have been established in such a manner as to ensure appropriate response under design basis conditions. Periodic ratest frequencies have been established based on risk analysis methods and as-foand conditions observed during the actuator rebuild offort, conducted in parallel with initial MOV program testing.
Flow testing has been performed to the extent required to ensure representative flow test data is available for each group of similar MOVs 1
covered by the GGNS NOV program. Valve groups were developed based upon a detailed engineering evaluation of parameters important to MOV operation.
/I i
l 9507060210 950628 hDR ADOCK 05000416 PDR
~.,
1 1
i 1
i June 28, 1995 i
5 GNRO-95/00072 Page 2 of 3 J
i 1
Standards and procedures have been developed to ensure that continuing design, testing, control switch adjustment, and maintenance activities are performed in a technically correct, consistent, and controlled manner.
}
Incorporation of flow test results obtained just prior to or during i
Refueling Outage 7 into design documentation is still on-going as previously indicated in our 07/23/93 submittal (GNRO-93/0078).
l We have had multiple meetings with, and presentations to, the NRC, particularly on the subject of valve grouping. A series of docketed 1
submittals on our MOV program culminated in the 07/23/93 response which i
defines the extent of our commitments to the rec - ndations of Generic j
Letter 89-10 as well as our programmatic intentions for the future. Please refer to that document in conducting any post-implementation review you may j-have planned.
i d,
Yo a tru l
i l_ ^
w 1
/
a chment:
Affirmation per 10CFR50.54f r
i cc Mr. J. E. Todrow (w/s) i j-Mr. H. W. Keiser (w/o) t Mr. R. B. McGehee (w/o) i Mr. N. S. Reynolds (w/o) i Mr. H. L. Thomas (w/o) i Mr. Stewart D. Ibneter (w/a) j.
Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W.,
Suite 2900 Atlanta, Georgia 30323 Mr. P. W. O'Connor, Project Manager (w/2)
Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commissica Mail Stop 13H3 Washington, D.C.
20555
=
BEFORE THE I
UNITED STATES NUCLEAR REGULATORY CONNISSION s
t l
LICENSE NO. NPF-29 i
DOCKET NO. 50-416 2
IN THE MATTER OF J
MISSISSIPPI PONER & LIGHT COMPANY and SYSTEN ENERGY RESOURCES, INC.
and SOUTM MISSISSIPPI ELECTRIC POWER ASSOCIATION I
and ENTERGY OPERATIONS, INC.
AFFIEMATION I, M. J. Meisner, state that I am Director Nuclear Safety & Regulatory Affairs of Entergy Operations, Inc.(Grand Gulf Nuclear Station)s that on behalf of Entergy Operations, Inc., System Energy Resources, Inc., and South Mississippi Electric Power Association I an authorized by Entergy Operations, Inc. to sign and file with the Nuclear Regulatory Commission, this closure to Generic Letter 89-10s that I signed this Generic Letter response as Director Nuclear Safety & Regulatory Aff rs, of Entergy Operations, Inc. (Grand Gulf Nuclear Station) and t t the statements made and the matters set forth therein are true and co ct to the best of my knowledge, information and belief.
1 s
j M. J. Meisner STATE OF MISSISSIPPI COUNTY OF CLAIBORNE SUBSCRIBED AND SWORN TO before me,Ma Notary Public in and for the County and !:tste above named, this 29 day of cote
, 1995.
(SELL)
OOr2 lU _
' \\
Notary Public MBSBS!PPI STA1TWIDE NOTARY K' DUO NY COMMISSION EXPIRES JUNE 5. ISM BONDED THEU STEGA!L E0IARY SEECE My commission expires:
..... -