ML19309G310
| ML19309G310 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/08/1979 |
| From: | Jacobs R RAD SERVICES, INC. |
| To: | North H NRC - NRC THREE MILE ISLAND TASK FORCE |
| Shared Package | |
| ML19309G307 | List: |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8005050539 | |
| Download: ML19309G310 (3) | |
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Interviewee:
Palp'1 Jacobs, Manager Instrument ServiceJ, Rad Services, Inc.
(out of Laurel, Maryland)
Rad Services, Inc.
500 Penn Center Pittsburgh, Pennsylvania 15215 Interviewer:
H. S. North, SIG/T4 Date:
October 8, 1979 at TMI Jacobs was interviewed informally on an unannounced basis.
He stated that he had been telephoned at the Salem plant, he belle", by Fred Huwe, Met-Ed, Foreman Rad Protection, on March 28 or 29.
He was asked to provide instruments, instrument maintenance and calibration services and H.P. personnel.
He said that he called Denny Burkhart, Instrument Technician, at Laurel, Md. and told him to pick up instruments and report to TMI.
Jacobs brought 25 to 30 instruments and dosimeters from the Salem facility and arrived at TMI at 2150, March 29 (Log 7906130470).
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He left the island at 2230. He returned with Burkhart at 2330 and remained until 0620 on March 30.
Jacobs said that Burkhart brought approximately 30 instruments of v arl aus types, counting equipment and detector shielding.
Jacobs said that on Ma rch 30, he had 1,000 pocket dosimeters, calibrated and ready for use. He also stattd that someone (he was unsure who,possibly Huwe or Dubiel) had telephoned Eberline 1Tstruments in New Mexico and purchased the entire shelf stock of certain instruments. These instruments, approximately (30) RO-2 and RO-2A, (15) E520, (12) teletectors and (2) PAC-45, arrived by air on March. 30.
Jacobs said that at the time of the accident Met-Ed had been negotiating a contract with Rat Services to provide maintenance and calibration service on all.H.P.
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'n-struments ucept portal monitors, hand and foot counters and the plant RMS which s Ort
2 to be maintained by the plant staff. He said that since the accident, Rad Services had continued to provide those services.
Jacobs said that when initially contacted by the plant staff, he was asked to provide H.P. Techs to assist at the plant. He said that approximately 20 Rad Services Techs arrived on April 3 or 4.
A couple of these techs were used at the observation Center in scheduling activities related to the on and off-site monitoring teams and the remainder were located in the plant doing posting, decon and cleanup as a part of the start of the recovery effort originally requested.
Jacobs said that approximately one month after the accident, he performed a check on the efficiency of the SAM-2 for 1131 He stated that he found the efficiq to be 0.4% rather than the 4% which was apparently used by the licensee during the accident.
This was due to the fact that the calibration was performed l33 source buried in a charcoal s ');--
using a small (1/2 - 3/4 inch diameter) Ba cartridge rather than a source the size of the cartridge. His calibration was I
based on I on a charcoal cartridge assayed by several GeLi systems, including
- ".C', r'ield laboratory. Jacobs said that SAM-2 is not a good instrument for the d to which it was put in the emergency by the licensee. He noted that it was not de' signed either for field use or to assay air samples for I but as a fuel assay instrument. He said the crystal size had been selected to optimize the assay of uranium and not I In addition, after the accident Eberline informed owners o9 SAM-2's that a modification was required. The electronic systems response to the 241 Am source used to provide a signal to stabilize the instrument was rgsulting 10 Thesepulseswhilenotinthe364KevIh negative pulses in the 60-100 Kev range.
peak area did serve to increase the background of the instrument..Jacobs said tha' A
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the NaI crystal can break due to thermal shock.
He said his examination of the licensee's SAM-2's had identified no crystal damage.
Jacobs said of the training necessary to operate the SAM-2 that an electronic technician on his staff had become competent on SAM-2's after " playing" with one for 40 or 50 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br />.
Jacobs said that the SAM-2 while not too good was the best available to his knowledge.
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