ML18053A381
| ML18053A381 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 05/13/1988 |
| From: | Holahan G Office of Nuclear Reactor Regulation |
| To: | Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| TAC-66548, NUDOCS 8805200125 | |
| Download: ML18053A381 (2) | |
Text
f j
(
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 20555 May 13, 1988 MEMORANDUM (OR:
Hubert J. Miller, Director Division of Reactor Safety Region III FROM:
Gary Holahan, Assistant Director Division of Reactor Projects - III, IV, V
& Special Projects
SUBJECT:
THE EFFECT OF ERRORS IN ROSEMOUNT TRANSMITTERS IN HARSH ENVIRONMENT ON EOPS AT PALISADES (TAC NO. 66548)
By memorandum dated March 24, 1987,. from N. J. Chrissotimos to Gary Holahan,
- Region III requested that NRR provide the following assistance:
- 1.
A review be performed to verify the adequacy of the appropriate trip set points at Palisades for parameters affected by the Rosemount transmitters.
- 2.
A review be performed to verify the adequacy of the EOP's in regard to the possibility of the operator being confused or mislead due to inaccurate readings 6f the Rosemount transmitters.
We reviewed a letter.from Daniel J. Malone (Consumers Power Company) to A. *s.
Gautam (NRC - Region III) dated May 26, 1987 and Consumers Power Company's Engineering Analysis Worksheets EA-KAT-87-01 and EA-BDM-87-14.
We have found that the instrument accuracies calculated by the licensee, while subject to refinement, are bounding for Palisades since the Rosemount Qualification Test produces a more severe environment than would be experienced in the post-accident condition at Pa1isades. *We conclude that, in general, the automatic trip functions for RPS and other safety-re 1 ated system actuations wi 11 be accomp 1 i shed early in the post-
--accident condition and prior to the major effects of the harsh environment on these signals.
We also conclude that the changes made to the EOP's for Entry to Shutdown Cooling and Entry to Once-Through Cooling are adequate.
Based on this, we conclude that continued operation of the Palisades Plant is justified at this time.
cc: D. Crutchfield.
G. Holahan V. Potapovs E. Greenman B. Burgess CONTACT:
T. Wambach, DRSP/NRR 492-1323.
8805200125 880513
' -1*1 PDR ADOCK 05000255 p
- ~j_ I I
E. Swanson R. Lasky R. Jones
~~ha1:: 11.f:::tor Division of Reactor Projects - III, IV, V
& Special Projects G. Lapinsky
... ~
. r:
~
j'
- '\\,.
~..n.......
. ¢*-.
May 13, l988 ribution File
-~
- ~MEMORANDUM FOR:
Hubert J. Miller, Director Division of*Reactor Safety Region III
& Local PDRs PD31 memo file MVirgilio TWambach Ringram FRQM:.
Gary Holahan, Assistant Director
SUBJECT:
Division of Reactor Projects - III, IV,. V
& Special Projects THE EFFECT OF.ERRORS IN ROSEMOUNT TRANSMITTERS IN HARSH ENVIRONMENT 'ON EOPS AT PALISADES (TAC NO. 66548). -~*
By memorandum dated March 24, 1987, from N. J. Chrissotimos to Gary Holahan, Region III requested that NRR provtde the following assistance:
- 1.
A review be performed to verify the adequacy of the appropriate trip.
set points at Palisades for parameters affected by the Rosemount transmitters.
- 2.
- A review be performed to verify the adequacy of the EOP 1s in regard to the possibility of the operator being confused or mislead-due to ina~curate ~eadings of the Rosemount transmitte~s-We reviewed a letter from Daniel J. Malone (Consumers Power Company} to A. :S.
~autam (NRC -. Region II I) dated May 26, 1987 and Consumers Power Company's Engineering Analysis Worksheets EA-KAT-87-01 and EA-.BQM-87-14.
We have *found that the* instrument accuracfes calculated by the licensee;.while subject to refinement, are bounding for Palisades since the Rosemount Qualification Test produces a more
- sev~r~~rivironment than.would be experienced in the post-accident condition at Pall.sades.
We conc.lude that, in general, th~ automatic trip functions for RPS and**
other safety-re lated system actuations wi 11 be accomplished. early in the post-accident condition and priQr to the major effect~ of the harsh environ~ent on these signals.
We also conclude that the changes made to the EOP 1s for Entry to Shutdown Cooling and Entry to Once-Through.Cooling are adequate.
Based on th_is, we :c_oncl~de..
. that continued cipe*rationof.-the P,alisades Plant*-is justified at'this*time.-* **
- cc: D. Crutchfield
.G. Holahan V. :Potapovs E. Greenman.
B. -Burgess
- CONTACT:
T. Wambach, DRSP/NRR 492-1323 PM: PD3itf ]/ tft/
TWAMBACH
-4 /88 S';JI
_
- Original signgd:c~Y Gary Ho)ahafl, Assistant Director _
.Division of Re~ctor Projects -.Ill, 1V, V
& Special Projects
- E. Swanson R. Lasky R. Jones G. Lapinsky
---v!J1/.
f D:Vo31
. ~LLER.
/-1fJ ///88 s
A'I
. GJ:WLAHAN
,§ljJl88
...