ML17053B587
| ML17053B587 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point, Susquehanna, Columbia, Limerick, LaSalle, Zimmer, Shoreham, Bailly File:Long Island Lighting Company icon.png |
| Issue date: | 04/14/1980 |
| From: | Eltawila F Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8004300064 | |
| Download: ML17053B587 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 APR 14 1OSO g (I
8 0 0'd:3000 OC Docket thos.
50-358, -352/353,
-367, -373/374, -387/388,
-410
-322, -397 Applicants:
Subject:
Members of Mark II Owners Group
'Working Meeting with Representatives of the Hark II Owners Group Re:
Foreign Data - Creare and 4TCO data (San Jose, California, March 26 and 27, 1980)
The purpose of this meeting was to discuss the staff concerns regarding the data from the Creare tests and the foreian full-scale test proarams and their re-lationships with the Mark II designs.
The staf 's concern stems from the preliminary observations of the 4TCO and the foreign test data.
The Hark II Owners Group indicated durina the meetina that tasks have been incorporated into their program to evaluate the 4TCO and the foreign test data to address the staff's concerns.
An attendance list and a copy of the non-proprietary handouts are enclosed.
The following summarizes the results of the meeting.
I.
t<RC Concerns 1.
Creare Test Program The staff's concerns regarding the Creare test program, based on the preliminary observations are:
a)
Scalino:
ihe staff indicated that the Hach scaling model was vio-lated since the yent length was not scaled and was kept constant in all systems and that chug time was observed tobe independent of'cale where it should have varied based on the scaling model.
a b)
Data presentation:
The staff indicated that, in addition to the presented average peak pressures, probability distributions for an individual vent and joint probability distributions for differ-ent vents in a "oool chug" are also needed.
2.
Farci n Test Pro rams The staff expressed concern that preliminary observations of foreign test data indicate that:
a)
Maximum chug amplitude exceeds the maximum observed at the.4T test facility; b)
Pressure amplitude among vents appears non-stochastic;
I
APR 14 1980 Members of Mark II Owners Group c)
There appears to be a segment of the pressure profile (40-100 sec.)
where a high percentage of high amplitude chugs were observed; d)
Chugs appear to be in-phase; and e)
Chug strength depends on blowdown history.
II.
Mark II Presentation 1.
Creare a)
Presentation of some new data b)
Discussion regarding multi-vent multiplier (less than 1) c)
- Phasing, chugs among vents occur within 20 ms 2.
Plant Evaluation Presentation of preliminary evaluation of asymmetric load conditions based on high chug amplitude from a foreign test and from the 4TCO was made.
III. Discussion Following the above presentations, a round-table discussion took place.
The following summarizes the outcome of the meeting.
The Mark II Owners Group has established a data exchange agreement with.he Japanese Nark II Owners Group and JAERI.
They have also established a pro-gram to evaluate these data and to make comparison with their chugging load specification (Lead Plant and Long Term Program).
They will also evaluate the chugging data obtained from the 4TCO tests to address the concerns identified by the staff.
The staff requested that the Mark II owners determine the bounding nature of the lead plant lateral and chugging loads specifications based on data comparisons from the 4TCO test and the foreign test.
Wit regar o
e h
- d. t th lead Mark II plant assessment of their design capability based on the interpretation of the 4TCO (see Su+nary of Meeti g
February 27, 1980),
the Zirmer applicant indicated that, based on the empiri-
'tion utilized for their design in the 2-50 Hz range, the de-cal load definition u i ize in 4TCO.
The LaSalle applicant indicated that their plant is designed to accommodate twice the maximum pressure o-served in the 4TCO in the frequency range 2-50 Hz.
The Shoreham applicant nas nnt represented at the meeting.
k.~'arouk Eltawila Containment Systems Branch Division of Systems Safety