ML20236S896
| ML20236S896 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 07/23/1998 |
| From: | Donohew J NRC (Affiliation Not Assigned) |
| To: | Hagan J ENTERGY OPERATIONS, INC. |
| References | |
| GL-97-04, GL-97-4, TAC-M99994, NUDOCS 9807270304 | |
| Download: ML20236S896 (4) | |
Text
AYk s uru UNITED STATES Iy g
g NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30666 4001
\\*****/
July 23, 1998 Mr. Joseph J. Hagan Vice President, Operations GCNS Entergy Operations, Inc.
P. O. Box 756 Port Gibson MS 39150
SUBJECT:
COMPLETION OF LICENSING ACTION FOR GENERIC LETTER 97-04 ON SUFFICIENT NET POSITIVE SUCTION HEAD FOR EMERGE.NCY CORE COOLING AND CONTAINMENT HEAT REMOVAL PUMPS FOR GRAND GULF NUCLEAR STATION, UNIT 1 (TAC NO. M99994)
Dear Mr. Hagan:
On October 7,1997, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 97-04, " Assurance of Net Positive Suction Head for Emergency Core Cooling and Containment Hiat Removal Pumps," to all holders of operating licenses or construction permits. The NRC issued the GL to confirm the adequacy of the net positive suction head (NPSH) available for emergency core cooling (including core spray and decay heat removal) and containment heat removal pumps under all design-basis accident scenarios.
In GL 97-04, the NRC staff specifically requested that you provide (ha following information for Grand Gulf Nuclear Station, Unit 1 (GGNS):
- 1. Specify the general methodology used to calculate the head loss associated with the ECCS suction strainers.
- 3. Specify whether the current design-basis NPSH analysis differs from the most recent analysis reviewed and approved by the NRC for which a safety evaluation was issued.
- 4. Specify whether containment overpressure (i.e., containment pressure above the vapor pressure of the sump or suppression pool fluid) was credited in the calculation of available NPSH. Specify the amount of overpressure needed and the minimum overpressure available.
- 5. When containment overpressure is credited in the calculation of available NPSH, confirm i
that an appropriate containment pressure analysis was done to establish the minimum l
containment pressure.
j O Q(\\
In response to GL 97-04, you provided the letters dated November 5 (GNRO-97/00107) and December 17 (GNRO-97/00121),1997. These submittals provided the information requested by the GL. The first letter provided the 30-day response stating that the 90-day response would be submitted by January 6,1998, and would be the result of the BWR Owner's Group effort on NPSH calculational methodology. The latter letter pmvided the 90-day response and addressed the 5 areas listed above. You stated that containmerit overpressure was not credited in the calculation of available pump NPSH and that the required NPSH is less than the available NPSH.
You also indicated that all work for the GL has been completed.
9807270304'990723 m*'~>q n mtp 4
DR ADOCK O 6
fg b {j l
(
Joseph J. Hagan i
.The staff has reviewed your responses and has concluded that all requested information has been provided and is acceptable; therefore we consider GL 97-04 closed for GGNS. We thank you for your prompt and complete response.
{
l Tais letter closes out TAC No. M99994. If you have any questions regarding this matter, please l
contact me at 301-415-1307 or by the Internet at "jnd@nrc. gov."
Sincerely, Y
Jack N. Donohew, Senior Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/IV Office of Nuclear Reactor R:sgulation Docket No. 50-416 cc: See next pago Ql3TRIBUTION:
Docket File PUBLIC PD4-1 r/f E. Adensam (EGA1)
J. Donohew T. Gwynn, RIV
C.Hawes J.Hannon J. Kudrick K. Kavanagh DOCUMENT NAME: A:\\99994.LTR
- See Previous Concurrend OFFICE PM/PD4-j N LA/PD4-1 l
- SRXB:NRR l
- SCSB.NRR l PD/PD4f f 1
NAME JDonohew)P CHawesOf17/
RCarute JKudrick JHannon DATE
'J/fA/qj' ~
7E3ff 07/15/98 07/17/98 1/13/,qj COPY YES/NO YES/NO YES/NO YES/NO YEg/NO )
OFFICIAL RECORD COPY V
(
r
4 i
Joseph J. Hagan The staff has reviewed your responses and has concluded that all requested information has been provided and is acceptable; therefore we consider GL 97-04 closed for GGNS. We thank you for your prompt and complete response.
This letter closes out TAC No. M99994. If you have any questions regarding this matter, please contact me at 301-415-1307 or by the Intemet at "jnd@nrc. gov."
Sincerely, 1
\\
e gth.Mv4:QW Jack N. Donohew, Senior Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-416 cc: See next page l
4 l
I s
i
4 Mr. Joseph J. Hagan L
- Entergy Operations, Inc.
Grand Gulf Nuclear Station I
- cc:
r.
Executive Vice President General Manager, GGNS
& Chief Operating Officer Entergy Operations, Inc.
Entergy Operations, Inc.
P. O. Box 756 P. O. Box 31995 Port Gibson. MS 39160 l,
Jackson, MS 39286-1995 Attomey General
. Wise, Carter, Child & Caiaway Department of Justice l
P. O. Box 651 State of Loulslana Jackson, MS 39205 P. O. Box 94005 Baton Rouge, t.A 70804-9005 Winston & Strawn 1400 L Strset, N.W. - 12th Floor State Health Officer Washington, DC 20005-3502 State Board of Health P. O. Box 1700 Director Jackson, MS 39205 Division of Solid Waste Management Mississippi Department of Natural' Office of the Govemor l
Resources State cf Mississippi l
' P. O. Box 10385 Jackson, MS 39201 Jackson, MS 39209 l-Attomey General President, Asst. Attomey General l
Claibome County Board of Supervisors State of Mississippi l
P. O. Box 339 P. O. Box 22947 Port Gibson, MS 39150 Jackson, MS 39225 l
Regional Administrator, Region IV Vice President, Operations Support I
l U.S. Nuclear Regulatory Commission Entergy Operations, Inc.
611 Ryan Plaza Drive, Suite 1000 P.O. Box 31995 Arlington,TX 76011 Jackson, MS 39286-1995 Senior Resident inspector Director, Nuclear Safety U. S. Nuclear Regulatory Commission and Regulatory Affairs P. O. Box 399 Entergy Operations, Inc.
Port Gibson, MS 39150 P.O. Box 756 Port Gibson, MS 39150 l
i l
I j