Khurram Mehboob

The objective of this study was to evaluate the extent of radon contamination in twenty-six drinking water samples from natural springs were collected from Dhirkot Azad Kashmir, along with four bottled mineral water samples. Radon gas escapes from the earth’s crust due to uranium ores and diffuses into the atmosphere. This study assessed the levels of radon concentration, the yearly effective radiation dose, and carcinogenic risk from radon exposure in drinking water samples. The radon concentration varied from 0.28 to 30.25 Bq/L. The mean radon concentration of all samples was found to be 7.86 ± 2.3 Bq/L. The radon concentrations in bottled drinking water were found to be lower than those in natural springs. The statistical and GIS analyses included the use of interpolation and Pearson’s correlation matrix. Seven samples had radon concentration that surpassed the standard limit established by the US-EPA, which is 11 Bq/L. The average annual effective dose from inhalation and ingestion was found to be lower than the value (0.1 mSv/y) provided by the WHO, but for some natural spring water samples, it exceeded the risk limit. The cancer risk revealed that 40% of the samples had an elevated lifetime cancer risk from radon exposure. Overall, the majority of the results obtained aligned with the worldwide guidelines established by the US-EPA. However, there were a few instances where the limits were exceeded, and constant monitoring is recommended. This study establishes a baseline for radon concentration in the area and provides a basis for future studies.

Since the Chernobyl disaster in 1986, decision support systems and modelling tools have been utilized in response to nuclear and radiological emergencies. The java-based real-time online decision support system (JRODOS) is a decision support tool that can be utilised in response to an emergency in managing off-site radiological consequences. This article documents the customization and use of JRODOS for Pakistan. JRODOS was tailored to the local Pakistan conditions, and a case study of a theoretical nuclear power plant accident was used to assess JRODOS’s feasibility as a decision support tool. A worst-case probabilistic accident scenario was used to identify zones and areas where urgent protective actions, early protective actions and food restriction and other response actions could be required. The areas and distances identified for the implementation of protective and response actions for such a hypothetical accident were found to be in agreement with the emergency planning zones and distances suggested by the International Atomic Energy Agency (IAEA). Additionally, the implications of meteorological and source term input parameters on predicting the radiation doses to members of the public were investigated. It was identified that the output of such tools strongly depends on the availability and accuracy of the input parameters, such as radioactive release and meteorological data. Limitations and uncertainties associated with these tools need to be considered in deciding on protective and other response actions in response to a nuclear accident. As established by the IAEA, protective and other response actions need to be applied on a graded approach, taking into account the protection strategy and uncertainties and limitations in the available information and criteria, based on the conditions at the facility and off-site.

During a nuclear or radiological emergency, timely implementation of precautionary urgent protective actions, urgent protective actions, early protective actions, and other response actions is inevitable for the protection of the public and the emergency workers. unmanned aerial vehicles commonly known as drones have numerous applications including their use in disaster management for support in early warning, provision of medical aid, monitoring, situational awareness, taking various protective and response actions, and post-accident assessment. In the current study, in comparison to drone applications in response to other disasters, their potential use in response to a nuclear or radiological emergency has been discussed. The drones use in mapping radiation and contamination levels in Fukushima nuclear power plant accidents have already proved their applications in a nuclear or radiological emergency. It is concluded that drones inherently complement the existing disaster management arrangements and have the potential for their use in strengthening arrangements for taking protective and response actions in case of a nuclear or radiological emergency.

The neutronics performance and safety characteristics of Uranium mononitride (UN) fuel for System-Integrated Modular Advanced Reactor (SMART) has been investigated to discern the potential for non-proliferation, waste, and accident tolerance benefits of UN fuel. The neutronic evaluation of UN fuel for SMART reactor has been carried out under normal operation using OpenMC and compared with Uranium dioxide (UO₂) in terms of fuel cycle length, reactivity coefficients, Fuel depletion (burnup), thermal flux, and fission product activity. The power peaking factor (PPF) has been compared at the beginning of the fuel cycle (BOC), mid of the fuel cycle (MOC), and at the end of the fuel cycle (EOC). Results indicate that the UN fuel can be operated beyond the designed fuel cycle length of the SMART reactor, which induces the positive reactivity at the end of the fuel cycle of about 4625 pcm. However, the UO₂ showed negative reactivity after three years. The total fission product activity at the end of the fuel cycle (3.5 years) for UO₂ and UN has been founded 1.003 × 10²⁰ Bq and 1.023 × 10²⁰ Bq, respectively.

Urogenital tuberculosis (UGTB) is almost 8%–15% of the extrapulmonary site of TB of all kinds, and epididymal involvement is rarer, counted only 28% of UGTB. Isolated tuberculous epididymitis (ITE), without the inclusion of prostate or clinical evidence of renal involvement, is an even more rare entity and is challenging to diagnose. However, isolated epididymis TB presented as a huge scrotal abscess with scrotal sack involvement is exceptionally uncommon. The symptoms of such ITE resemble the epididymo-orchitis or malignant tumor, which results in misdiagnosis or delay in diagnosis. A 32-year-young man, sexually inactive, was presented with a rapid, painless scrotal growing. There was no clinical evidence for TB. Clinical examination of the genitalia revealed an enlarged right tactical with intratesticular masses (abuses) and swollen spermatic cord along with inflamed epididymitis. The radiological and laboratory shows no evidence of TB with clear chest X-rays, normal blood, and urine analysis. There were no symptoms of Mycobacterium tuberculosis during the microdot enzyme immunoassay analysis. A repeated magnetic resonance imaging and ultrasonic investigations were performed that revealed findings suggesting a chronic inflammatory process with severe abscess involving the spasmatic cord and scrotal sack, which mislead the diagnosis of epididymo-orchitis. Later, the extensive formation of superficial abscess breaches the scrotal sack. A pathological investigation of excretion and intrascrotal tissues established the diagnosis of ITE. The patient was kept on anti TB treatment medications for 12 months due to delay in diagnosis (12 weeks), continuous discharge, and severe involvement of epididymitis along with a scrotal sack and spermatic cord and had a remarkable recovery. The delayed diagnosis of ITE could lead the severe complication, which could result in surgical intervention or an orchiectomy. The first line of treatment should be the pharmacological approach for cases of epididymis TB, and surgery should be the 2^nd option. A surgical procedure should be considered only in cases where the diagnosis is not established or when there is a strong clinical indication such as abscesses, cutaneous fistulas, or extensive involvement of the epididymis and testis.