ML20004A749
| ML20004A749 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/19/1981 |
| From: | Knight J Office of Nuclear Reactor Regulation |
| To: | Novak T, Tedesco R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8105220105 | |
| Download: ML20004A749 (4) | |
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MAY 191981 i
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MEMORAUDUM FOR: Robert L. Tedesco, Assistant Director for Licensing, DL tD laQ Thomas.H. Hovak, Assistant Director for Operating Reactors, DL
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FROM:
JEmesP. Knight,AssistEntDirectorfor C
Components & Structures Engineering, DE Jg
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SUBJECT:
REPORTING OF UNSATISFACTORY EPRI/PWR TEST RESULTS FOR POWEP, OPERAT D RELIEF VALVES d
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References:
(a) EPRI memorandum, dated 5/1/81 l
l (b) EPRI memorandum, dated 5/15/81 l
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l As described in the referenced memorandums, the Dresser PORY model no. "1533VX-30 I
l and the Target Rock PORY model no. 80X-006-1 failed the initial. loop seal simulation tests at Wyle. The valves opened.on 110' E water at full pressure 2500 psi, but failed to close as water temperature was ramped up to 650*F, a condition similar to that experienced in plants with loop seals upstream of the PORV's.
The Dressen PORY in question is i>elieved to.be inst $11ed in CE $nd B&W PWR's only and Fort Calhoun specifically is known to have loop seals upstream.of Dresser l
PORV's. The Target Rock valve is. reported by not used on any operating plants l
but is planned for use on some plants presently under construction.
Itisrequestedth$ toper $tingPWR's$ndNTOL'si>econtEctedtodeterminewh$t corrective action..if any, is being taken by the licensees and NTOLs for which.
the above test results are applicable. In addition, this information may also be relevant for licensing board. notification. It is.further noted that.the Target.
i Rock and. Dresser.PORV's in question were. disassembled and inspected and no visible damage was observed which would affect future operation or testing. The.Nechanical Engineering Branch.will forward the results of future testing of these valves as they become available.
l James P. Knight, Assistant Director for Comoonents f4 Structures Engineering Division of Engineering ec; R. Vollmer, DE Z. Rosztoczy, DE R. Bosnak, DE R. Woods, IE F. Cherny, DE E. Jordan, IE E. Heminger, DE 8105220/0 5-n,j MEE.
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Memorandum EPM May 1,19Et1 TO:
DISTRIBUTION j
FROM:
JOHN J. CAREY 4 '
SUBJECT:
5/RV TEST ACTIVIT The EPRI/PdR Safety and Relief Valve Test Program testing activities for the period of April 27 - May I were as follows:
WYLE Testing on the Target Rock valve resweed this week. On Monday, the low pressure 665 psi,100 F, water test was performed. On Tuesday, the full 0
pressure 2500 psi, 4500F, water test was performed.
For these tests, as well as the previous tests, the Target Rock valve opened and closed as expected. The valve passed the screening criteria. On Wednesday, the full pressure 2500 psi, loop seal simulation test wag performed. The water just upstream of the valve was 1100F followed by 650"F water.
For this test, the valve c.pened as expected.
Upon de-energiring the valve for closure.
_the valve remained opened for approximately 12 seconds and then closed.- The valve did riot pass the screening criteria for this condition (failure to close upon demand). The valve was removed from the test facility and disassembled by the Target Rock Representative. No damage was observed that would affect future testing. The valve was re-installed in the test facility. The full pressure 2500 psi, 6500F, water preload test is scheduled for today.
Coe USTTON ENGINEERING All work on facility construction was completed this week. Pre-test adjustments will continue through the weekend. The first full pressure 2500 psi, steam shakedawn test < s scheduled for Monday, May 4,1981.
JJC/WJB/ad 0157RIBUTION:
D. Hoffman ~
- Telecopy #517-788-0134 J. St tt
- Telecopy #201-430-6734 '
F. Cherny (FRC) - Telecopy #301-492-4994 Panafax set at 6 J. Turnage R. Newton W. Jones K. Berry T. Citft W. B. Loewenstein G. Williamson dan fg
$l S/RV Staff Technical Contacts - Participating Utilities IUI J. Taylor
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M@morandum EPRI
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May 15,1981 -
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DISTRIBUTIDN FROM:
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A The EPRI/PWR Safety and Relief Valva Test Program testing ' activities for the period of May 11 - May 15 were as follows:
WYLE The full pressure preload test and the 110*F/6500 water seal test on the Dresser relief valve were performed as scheduled last Friday, May 8.
The screening criteria was met for the preload test. The Dresser valve perform-ance for the water seal simulation test was similar to the Target Rock valve perfomance for the-same test condition. The Dresser valve opened as expected. Upon de-energ: ring the valve for closure, the valve remained open until the valve was isolated from the test loop.
Following test valve isolation, the valve closed. The valve did not pass tite screening criteria (failure to close on demand). The valve was. removed from the test facility and disassembled by the & esser Representative. No damage was observed tLat' would affect future te: ting.
During this water seal simulation test larger than expected berding moments -
were measured in the upstream and downstream piping.
It has been speculated that this resulted from the uneven exhausting of the 1100F water through the downstream ramshead. To eliminate' the re-occurence of this during future testing the ramshead has been removed.
The Target Rock valve was reinstalled in the test loop. A full' pressure steam test was perfomed Wednesday, May 13. The preload test originally scheduled for Monday, May 11, was performed Thursday, May 14.
In addition
-- a steam to 6500F water transition test was performed.
For the above tests on the Target Rock valve the screening criteria were met.
Resumption of testing on the Dresser relief valve is scheduled for Monday, May 18. Present plans call for retesting the Dresser valve for the water seal simulation test condition.
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P00R ORIGINAL
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S/AY) Test Activity
!.. Fay 11 - May 15,1981 f
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C0teU3TICM ENGINEERING.
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' The first full pressure 2500 ps'i ste'am_ shakedown test utilizing a Garrett :
1 valve was performed on May 9.. This week three cdditional full pressure tests were performed. The tests were three loop seal tests with different discht,rge.
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pipe backpressure valve settings.
j kring this week EPRI and C : have re-assessed the amount of testing that.can be completed by July 1.
Assuming that there are no delays encountered during-the remahder of the shakedown tests and that the official tests on the r
Dresser safety valve start the week of May 18 forty.of the sixty initially
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. planned tests should be completed by July 1,1981. Approximately one. month l
.of additional time will be required to craplete all of the currently planned tests.
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l JJC/WJE/ad DISTRIBUTION:
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D. Hoffman
- Telecopy #517 788-0134 J. Scott
. - h6 4 copy 7201-430-6734 "
l F. Cherny (NRC) - Teb copy f301-492-4994 Panafax set at 6 l
R. Newton W. Jones 1
K. berry i
T. Clift Technical Contacts - Participating Utilities W. B. Loewenstein J. Taylor F. Arrotta G. Williamson S/RV Staff
_7 200R ORIGINAi
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