Hazards control progress report No. 58, April-September 1979
Unliable fmm Suiron.il 7ei:hriu:.il Inli'rnijti in Scrua' • I S Department ol dimmerfc 52*5 Pun Rm.il R.ud t SprmaiiuU. *-\ llM* S6.00 per aipv • IMiaiifichr S. I 50 I \1 FOREWORD This report is divided into three major sections. The first section, Progress Reports, covers the status of activities undertaken or continuing during the period; additional reports or separate publications will cover the final results of these activities. The second section. Technical Notes, contains reports on
... ns reports on interesting ac tivities of a more limited scope on which further reporting is not anticipated. The third section lists recent publications. Six radiation counters are used daily to process approximately 3500 samples per month in the Hazards Control counting laboratory. Because of the large number of samples and their diversity, data analysis has become cumbersome. To alle-,-:;'"this problem and to reduce the time required for reporting sample results, we have generated com puter programs that enable us to process and stare radiation-counting data on a PDP1I computer system. These programs, written in BASIC to facilitate operator interaction and program modification, also provide hard copy reports of the counting results. The configuration of the PDPI1 computer system used by the counting laboratory is shown in Fig. I. 1 Currently, there are six radiation counters in use: four alpha-beta counters and two liquid scintillation counters automated to count varying numbers of samples in each counter cycle. After a sample is counted, gross counts and sample iden tification information are transmitted to a teletype (TTV) and to a file on an LSMI microprocessor by an interface. After all the samples have been count ed, the file, which is unique to the counter run, is closed and stored on a floppy disk. When the data for the run are ready for processing, the file is ac cessed by the LSI-11 data link and stored on a high speed hard disk interfaced to the PDP11-10 com pute-. The data are then processed by the analysis programs described here, A data sheet having a format compatible with quick teletype emr; into the computer (Fig. 2) records sample data collected by the technician, the analytic laboratory, and the counting laboratory (e.g., sample type, sample identification, and sample volume). This information is then entered into the computer manually and stored in a file identifiable with the file containing the counting results. The analysis programs use these wo files to process the sample data and create a permanent file containing all pertinent information and results for a particular counter run. A program generates a hard copy report from this file, which is initially stored on a disk and later transferred to magnetic tape or floppy disk for permanent storage. The automation program includes 17 in dividual subprograms that are chained together in a modular sequence to complete the data analysis, the permanent file, and the bard copy report (Fig. 3) . The chained modular sequence is advantageous because it allows us to alter one subprogram without altering another and to add other counters by adding the appropriate data-formatting program to ihe sequence-e.g., a TAPE program. A sum mary of the various subprogram functions is given in Table 1 . Figures 4 and 5 illustrate the program-file manipulation sequence for alpha-beta counters and liquid scintillation counters, respectively. Program CRDATA initiates the data processing and writes a temporary file (CTR) containing a six-digit file code for the permanent file. The file code includes the one-digit counter identification (A, B. C. D. E. or F), the three-digit Julian date, and the two-digit run number. At this point one of two programs (SHEETA in Fig. 4 and SHEETD in Fig. 5 ) is au tomatically chained in to accept the leletyped input from 'he data sheet. This program formats the data sheet information, transfers it to a temporary file, SHEET(X) (Fig. 4) or SHEET(Y) (Fig 5) . and then creates an additional temporary file. BKPOS(X) (Fig. 4) or BKPQS(Y) (Fig. 5) . The additional tem porary file contains the samp!: start position in the counter, the counter position for background sam ples, and the number of samples, A program that opens the data link and transfers the counter results onto the PDPI1-10 hard disk from the floppy disk file, FILEA(X) (Fig. 4) or FILEA(Y) (Fig. 5) , is then chained in. This program, TAPE(X) in Fig. A or TAPE(Y) in Fig. 5. can also accept paper tape in put from the counter teletypes if the data link or the counter interfaces arc nonfunctional. During the Radiation counters ^mLTJ m j t jf \ t • v7 v7 v7 v7 \7 v7 WBCPHA f IC. 1. Coafipratkw of the PDP11 conitter lyiteni Mtd for the collection and analysis of cwmtiitt data.