ML17298A686
| ML17298A686 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 11/30/1983 |
| From: | Licitra E Office of Nuclear Reactor Regulation |
| To: | Novak T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8312090342 | |
| Download: ML17298A686 (4) | |
Text
NOV 3 0 1983 MEMORANDUM FOR:
Thomas M. Novak, Assistant Director for Licensing, DL THRU:
FROM:
SUBJECT'eorge W. Knighton, Chief, Licensing Branch No. 3, DL E. A. Licitra, Project Manager, Licensing Branch No. 3, DL UPDATED STATUS ON PALO VERDE RCS PUMPS AND RELATED MATTERS On November 16,
- 1983, Chuck Ferguson, CE provided a telephone update on the status of the efforts for resolving the anomalies found at Palo Verde Unit 1 following hot functional testing.
Also participating on the call were George Davis, CE and Bill guinn, APS.
The status is an update of the status provided at the October 12, 1983 meeting and is summarized as follows.
~RCS Pum s
Testing of the full scale prototype pump with the original design (baseline) has been completed at the CE Newington facility.
Data is currently being processed and evaluated.
Preliminary indications are that higher strains and accelerations occur in the area that is 180 from the discharge side of the pump.
Also, the strains and accelerations do increase with increased flow rates.
After the pump was disassembled for design modifications, there were no broken or loose bolts.
- However, a crack was found in the diffuser section, on the opposite side of the discharge line.
The prototype pump has been modified to incorporate the design changes (e.g.,
larger gap size, more and longer bolts, cut-back of the diffuser vanes and backfiling of the impeller vanes) and testing of the pump was scheduled to start by ll/17/83 (actually started 11/19/83).
Modifications to the Unit 1 pump internals is nearing completion and work on the Unit 2 parts is in progress.
To expedite the work, surface machining, hole drilling and rough cutting are being performed at both Newington and in a shop in Cleveland.
Final machining is being done at Newington.
Ship-ment of the modified Unit 1 parts to the Palo Verde site should be completed by 11/28/83.
Thermal Sleeves The four thermal sleeves from the cold legs have been removed from Unit 1 and the expansion groove has been ground out of three locations.
Grinding of the last location is in progress.
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Thermowells The vortex shedding testing of the modified thermowell design at the Windsor facility has been completed.
Data reduction is in progress.
Additional testing of the design will be performed at the Newington pump facility while testing the modified pump design.
Modifications to Palo Verde Unit 1, to incorporate the modified thermowell
- design, are 80$ complete.
CEA Shroud Assemblies Hydraulic testing and most of the mechanical testing of the model shroud components have been completed and the data are currently being reduced.
An additional model test to induce cracking is scheduled to start shortly.
In addition, the Unit 1 shroud assembly had been shipped to Newington and testing of this was assembly to start shortly to compare results to those obtained via component testing.
After all the testing is complete, the results will be reviewed with APS to determine what should be done to correct the cracking problems encountered during hot functional testing at Unit 1.
Identification of the mods is tentatively scheduled for ar'ound the end of November 1983.
cc:
H. Denton R. Purple R. Mattson H. Thompson F. Miraglia V. Noonan B. Liaw J.
Jackson D. Terao L. Dewey T. Young G. Fiorelli OL:LB¹3 ggA EALicitra/yt G I 11/Jf/83 1 /P D. Eisenhut R. Vollmer T. Speis J.
Funches J. Knight R.
Bosnak G. Bagchi S.
Hou D. Sellers T. Bishop P. Narbut J.
Weidenhamer
¹3 ghton
/83 E. A. Licitra, Project Manager Licensing Branch No.
3 Division of Licensing DISTRIBUTION
-Document-Control-50=528/529/530 PRC System LB¹3 Reading JLee EALicitra
- Attorney, OELD TMNovak GWKnighton LPDR NRC PDR
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