ML20236D430
| ML20236D430 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/16/1989 |
| From: | Black S Office of Nuclear Reactor Regulation |
| To: | Kingsley O TENNESSEE VALLEY AUTHORITY |
| References | |
| IEB-88-004, IEB-88-4, TAC-R00428, TAC-R00429, TAC-R428, TAC-R429, NUDOCS 8903230102 | |
| Download: ML20236D430 (4) | |
Text
0 nt:q k
UNITED STATES
[
g NUCLEAR REGULATORY COMMISSION E
WASHINGTON, D. C. 20666 j'
O m y e ;r March 16, 1989
[
.[d DocketNos.$50 and a 50-l l
Mr. Oliver D. Kingsley, Jr.
Senior Vice President Nuclear Power Tennessee Valley Authority i
6N 38A Lookout Place 1101 Market Street l
Chattanooga, Tennessee 37402-2801
Dear Mr. Kingsley:
SUBJECT:
RESPONSE TO NRC BULLETIN 88 SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2, (TACS R00428/R00429)
On May 5, 1988, the NRC staff issued NRC Bulletin 88-04, " Potential Saf b
l Related Pump Loss." The bulletin requested the evaluation of all ng I
safety-related pumps for 1) pump-to-pump interaction during miniflow te D h)fy operation that could result in dead-heading of one or more of the pumps N '; B ;p :.i and 2) the adequacy of the minimum flow bypass lines with respect to damege resulting from operation and testing in the minimum flow mode.
The bulletin also requested that within 60 days of receipt of the bulletin, licensees provide a written response that (a) summarizes the problems and the systems affected, (b) identifies the short-term and long-term modifications to plant operating procedures or hardware that have been or ce being implemented to ensure safe plant operations, (c) identifies an appropriate schedule for long-term resolution of this and/or other significant problems that are identified as a result of this bulletin, and (d) provides justification for continued operation particularly with regard to General Design Criterion 35 of Appendix A to Title 10 of the Code of Federal Regulations (10 CFR Part 50),
" Emergency Core Cooling" and 10 CFR 50.46, " Acceptance Criteria for Emergency Core Cooling Systems for Light Water Nuclear Power Reactors." Additionally, the staff requested that within 30 days of completion of the long-term resolution actions, that licensees provide a written response describing the actions taken.
1 The Tennessee Valley Authority (TVA) responded to Bulletin 88-04 with regard to Sequoyah by letter dated August 2, 1988.
This response provided the information requested in a, b, c, and d, above.
It was stated that the pumps of Sequoyah's safety-related systems are not adversely affected by the miniflow operating conditions identified in the bulletin except for the residual heat removal (RHR) and the motor driven auxiliary feedwater l
(MDAFW) pumps.
The response described the long-term resolution actions of having surveillance procedures to monitor performance of the RHR and MDAFW pumps. TVA stated the procedure for the MDAFW pumps has been revised l
and that revised procedures for the RHR pumps would be completed by l
October 30, 1988.
By telephone call on March 6, 1989 TVA stated that the procedures have been completed for the RHR pumps.
The justifications for continued plant operation are acceptable.
This fulfills your requirements in responding to Bulletin 88-04.
f 8903230102 890316 PDR ADOCK 05000327 i
O PDC I g
~
~.
\\.
'f.
As discussed'iniBulletin 88-04, you should document and maintain for at least two years an-iValuation of your actions in responding to the bulletin. These records may be~ subject to future audit.
Sincerely,
)ccch, ktu) \\ -lvt
/
Suzanne C. Black, Assista Director
(
for Projects
)
TVA Projects Division Office of Special Projects cc:
See next page i
i s,"
l
v
~
.. As discussed in Bulletin 88-04, you should document and maintain for at least two years an evaluation of your actions in responding to the bulletin.
These j
records may be subject to future audit.
Sincerely, h3 (flW Suzanne C. B1 k, Assistant Director for Projects TVA Projects Division Office of Special Projects j
l cc See next page DISTRIBUTION Docket File RPierson GPA/PA NRC PDR FMcCoy GPA/CA Local PDR SVarga SQN Rdg. File Projects Rdg.
BGrimes LWatson (2)
ADSP Rdg.
EJordan TAlexion DCrutchfield DHagan BDLiaw TMeek (8)
SBlack WJones MSimms EButcher JDonohew ACRS(10)
Rh
- NRR:T yAD :
OFC :NRR:TVA/LA :
R: VA/p__::NRR:TVAPM a.
L bin:dw:S_7__:__ N NAME :MSims %___ ::JDon w
- M
_____:A/I__/89 : o /\\b/89
- 9 / l(O /89 DATE
- e / ll3/89 :
s 0FFICIAL RECORD COPY
,j.
Mr. Oliver D. Kingsley, Jr.
3-Sequoyah Nuclear Plant aNb CC:
General Counse R Regional Administrator, Region II j
Tennessee Valley Authority U.S. Nuclear Regulatory Comission
~
400 West Sumit Hill Drive 101 Marietta Street, N.W.
E11 B33 Atlanta, Georgia 30323 Knoxville, Tennessee 37902 Resident Inspector /Sequoyah NP Mr. R. L. Gridley c/o U.S. Nuclear Regulatory Commission Tennessee Valley Authority 2600 Igou Ferry Road SN 1578 Lookout Place Soddy Daisy, Tennessee 37379 Chattanooga, Tennessee 37402-2801 Mr. John T. LaPoint Mr. Michael H. Mobley, Director Tennessee Valley Authority Division of Radiological Health Sequoyah Nuclear Plant-T.E.R.R. A. Building, 6th Floor P.O. Box 2000 150 9th Avenue North Soddy Daisy, Tennessee 37379 Nashville, Tennessee 37219-5404 Mr. M. Burzynski Dr. Henry Myers, Science Advisor.
Tennessee Valley Authority Comittee on Interior Sequoyah Nuclear Plant and Insular Affairs P.O. Box 2000 U.S. House of Representatives Soddy Daisy, Tennessee 37379 Washington, D.C.
20515 1
Mr. D. L. Williams Tennessee Valley Authority Tennessee Valley Authority Rockville Office j
400 West Sumit Hill Drive 11921 Rockville Pike 1
W10 885 Suite 402 l
Knoxville, Tennessee 37902 Rockville, Maryland 20852
-l County Judge Hamilton County Courthouse Chattanooga, Tennessee 37402 i
-l