ML20079P169
| ML20079P169 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 11/05/1991 |
| From: | Zeringue O TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-04, GL-89-4, NUDOCS 9111120260 | |
| Download: ML20079P169 (3) | |
Text
__
e l
A
.~.~.,m..,,_.~..
. m.
.m.,
o s w re-w
- v. # bcs %.1 4. w-2 i e.., (.py.._,
NOV 0 51991 U.S. Nuclear Regulatory Commission ATTH: Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-260 50-296 BROWNS PERRY NUCLEAR PLANT (BFH) - AMERICAN SOCIETY OF MECilANICAL ENGINEERS (ASME) SECTION XI - PUMP AND VALVE TESTING (P&VT) PROGRAM, REQUEST FOR RELIEF
Reference:
Generic Letter No. 89-04 dated April 3, 1969, NRC's Guidance for Developing an Acceptable In-service Testing Program Enclosed is a Request for Relief (RFR) from the code requirement for comparing the latest stroke time for power operated valves, with the previous tested stroke time to determine valve testing frequency. The proposed alternative is in accordance with the Enclosure, position 6 of the reference, which states measuring changes in stroke times from a reference value as opposed to measuring changes from the previous test is an acceptable (and possibly better) s.lternative.
TVA vill implement this request 90 days from the issuance of this letter for valves with reference values of 10 seconds or less.
For valves with reference values of greater than 10 seconds, TVA vill implement this request only after receipt of a safety evaluation report.
i There are no commitments contained in this letter.
If you have any fg.
questions, please telephone R. R. Baron, DFN, (205) 729-7566.
nNa SSE y
Sincerely, so
,n
- g
-J
,ry-02
/ {.;',.lhllth; s
l J.Zeringu/
/
w T
e f
HL pY[
I "w
Nd Enclosure c:
See page 2 l
A2QQ}(
2, U.S. Nuclear Regulatory Commission NOW O b T.M i ec (Ena.losure):
NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35609-2000 Mr. Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region 11 101 Marietta Street, NW, Suitc 2900 Atlanta, Georgia 30323
V.
r go 1 of 1 Et11gL.Reguentifumhgr_l'hN System:
Various brawing:
Various Valves:
All valves listed in the BFN ASKE Section XI IST Program Class:
1, 2, 3, NC Punction:
Various Impractical Test Requirement:
IWV-3417(a) requires comparison of the latest test stroke time with the previous test stroke time to determine valve testing frequency.
Basis for Relief: MRC Generic 1,etter 89-04 states that measuring changes in stroke times from a reference value as opposed to measuring
~;
changes frce the previous test is an acceptable alternative for valves with stroke times 10 seconds or less. The NRC further stated in response to questions on Gh 89-04 that the use of reference valve stroke times as a baseline for comparison of routine test stroke times is a better method of evaluating changes in valve performance (including valves with stroke times over 10 seconds) than that required by the ASME Code (IWV-3400). ASME OM-10 specifies the use of reference values for comparison of routine test stroke times.
Alternative Testing:
Use reference values determined when the valve is known to be operating acceptably as the baseline for evaluating routine test stroke times for corrective action.
635(306)/83 ll